Analytic_TheEliminationofMetaphysicsThroughLogicalAnalysisofLanguage_1932.txt

-

-

3

The Elirniizatiorz of Metaphysics

Through Logical Arzalysis
of Language
BY

R U D O L F CARNAP

(TRANSLATED
BY ARTHUR PAP)

THEREHAVE BEEN many opponents of metaphysics from the Greek
skeptics to the empiricists of the 19th century. Criticisms of very
diverse kinds have been set forth. Many have declared that the doctrine of metaphysics is false, since it contradicts our empirical knowledge. Others have believed it to be uncertain, on the ground that its
problems transcend the limits of human knowledge. Many antimetaphysicians have declared that occupation with metaphysical questions is sterile. Whether or not these questions can be answered, it is at
any rate unnecessary to wony about them; let us devote ourselves
entirely to the practical tasks which confront active men every day
of their lives!
The development of modern logic has made it possible to give a
new and sharper answer to the question of the validity and justification of metaphysics. The researches of applied logic or the theory
of knowledge, which aim at clarifying the cognitive content of scientific statements and thereby the meanings of the terms that occur
in the statements, by means of logical analysis, lead to a positive
and to a negative result. The positive result is worked out in the
domain of empirical science; the various concepts of the various'
branches of science are clarified; their formal-logical and epistemological connections are made explicit. In the donlain of metaphysics,
This article, originally entitled "Uberwindung der Metaphysik durch Logische
Analyse der Sprache," appeared in Erkennt~zis,Vol. 11 (1932). It is published here
with the kind permission of Professor Carnap.

The Elirniirotion of Adetaphysics

[61 1

including all philosophy of value and normative theory, logical
analysis yields the negative result that the alleged statements in this
dornain are entirely nzeaningless. Therewith a radical elimination of
metaphysics is attained, which was not yet possible from the earlier
antimetaphysical standpoints. It is true that related ideas may be
found already in several earlier trains of thought, e.g. those of a
nominalistic kind; but it is only now when the development of logic
during recent decades provides us with a sufliciently sharp tool that
the decisive step can be taken.
In saying that the so-called statements of metaphysics are meaningless, we intend this word in its strictest sense. In a loose sense
of the word a statement or a question is at times called meahingless
if it is entirely sterile to assert or ask it. We might say this for instance about the question "what is the average weight of those inhabitants of Vienna whose telephone number ends with '3'1" or about
a statement which is quite obviously false like "in 1910 Vienna had
6 inhabitants" or about a statement which is not just empirically,
but logically false, a contradictory statement such as "persons A
and B are each a year older than the other." Such sentences are
really meaningful, though they are pointless or false; for it is only
~neaningfulsentences that are even divisible into (theoretically) fruitful and sterile, true and false. In the strict sense, however, a sequence
of words is meaningless if it does not, within a specified language,
constitute a statement. It may happen that such a sequence of words
looks like a statement at first glance; in that case we call it a pseudostatement. Our thesis, now, is that logical analysis reveals the alleged
statements of metaphysics to be pseudo-statements.
A language consists of a vobbulary- and a syntax, i.e. a set of
words which have meanings and rules of sentence formation. These
rules indicate how sentences may be formed out of the various sorts
of words. Accordingly, there are two kinds of pseudo-statements:
either they contain a word which is erroneously believed to have
meaning, or the constituent words are meaningful, yet are put together
in a counter-syntactical way, so that they do not yield a meaningful
statement. We shall show in terms of examples that pseudo-statements
of both kinds occur in metaphysics. Later we shall have to inquire
into the reasons that support our contention that metaphysics in its
entirety consists of such pseudo-statements.

A word which (within a definite language) has a meaning, is
usually also said to designate a concept; if it only seems to have a

RUDOLF CARNAP

'

meaning while it really does not, we speak of a "pseudo-concept."
How is the origin of a pseudo-concept to be explained? Has not
every word been introduced into the language for no other purpose
than to express something or other, so that it had a definite meaning
from the very beginning of its use? How, then, can a traditional language contain meaningless words? To be sure, originally every word
(excepting rare cases which we shall illustrate later) had a meaning.
In the course of historical development a word frequently changes
its meaning. And it also happens at times that a word loses its old
sense without acquiring a new one. It is thus that a pseudo-concept
arises.
WHat, now, is the meaning of a word? What stipulations concerning a word must be made in order for it to be significant? (It
does not matter for our investigation whether these stipulations are
explicitly laid down, as in the case of some words and symbols of
modern science, or whether they have been tacitly agreed upon, as
is the case for most words of traditional language.) First, the syntax
of the word must be fixed, i.e. the mode of its occurrence in the
simplest sentence form in which it is capable of occurring; we call
this sentence form its elementary sentence. The elementary sentence
form for the word "stone" e.g. is "x is a stone"; in sentences of this
form some designation from the category of things occupies the
place of "x," e.g. "this diamond," "this apple." Secondly, for an
elementary sentence S containing the word an answer must be given
to the following question, which can be formulated in various ways:
(1.) What sentences is S deducible from, and what sentences
are deducible from S?
(2.) Under what conditions is S supposed to be true, and under
what conditions false?
(3.) How is S to be verified?
(4.) What is the meaning of S?
( 1 ) is the correct formulation; formulation (2) accords with
the phraseology of logic, ( 3 ) with the phraseology of the theory of
knowledge, (4) with that of philosophy (phenomenology). Wittgenstein has asserted that (2) expresses what philosophers mean by
(4) : the meaning of a sentence consists in its truth-condition. ( ( 1) is
the "metalogical" formulation; it is planned to give elsewhere a detailed exposition of metalogic as the theoly of syntax and meaning,
i.e. relations of deducibility.)
In the case of many words, specifically in the case of the overwhelming majority of scientific words, it is possible to specify their
meaning by reduction to other words ("constitution," definition).

The Elimination of Metaphysics

[63 1

E.g. "'arthropodes' are animals with segmented bodies and jointed
legs." Thereby the above-mentioned question for the elementary sentence form of the word "artl~ropode," that is for the sentence form
"the thing x is an arthropode," is answered: it has been stipulated
that a sentence of this form is deducible from premises of the form
"X is an animal," "x has a segmented body," "x has jointed legs,"
and that conversely each of these sentences is deducible from the
former sentence. By means of these stipulations about deducibility
(in other words: about the truthcondition, about the method of verification, about the meaning) of the elementary sentence about "arthropode" the meaning of the word "arthropode" is fixed. In this way
every word of the language is reduced to other words and finally to
the words which occur in the so-called "observation sentences" of
"protocol sentences." It is through this reduction that the word
acquires its meaning.
For our purposes we may ignore entirely the question concerning
the content and form of the primary sentences (protocol sentences)
which has not yet been definitely settled. In the theory of knowledge
it is customary to say that the primary sentences refer to "the given";
but there is no unanimity on the question what it is that is given. At
times the position is taken that sentences about the given speak of the
simplest qualities of sense and feeling (e.g. "warm," "blue," "joy"
and so forth) ; others incline to the view that basic sentences refer to
total experiences and similarities between them; a still diierent
view has it that even the basic sentences speak of things. Regardless
of this diversity of opinion it is certain that a sequence of words has
a meaning only if its relations of deducibility to the protocol sentences are fixed, whatever the charactef-istics of the protocol sentences may be; and similarly, that a word is significant only if the
se~itencesin which it may occur are reducible to protocol sentences.
Since the meaning of a word is determined by its criterion of
application (in other words: by the relations of deducibility entered
into by its elementary sentence-form, by its truth-conditions, by
the method of its verification), the stipulation of the criterion takes
away one's freedom to decide what one wishes to "mean" by the
word. If the word is to receive an exact meaning, nothing less than
the criterion of application must be given; but one cannot, on the
other hand, give more than the criterion of application, for the
latter is a sufficient determination of meaning. The meaning is implicitly contained in the criterion; all that remains to be done is to
make the meaning explicit.
Let us suppose, by way of illustration, that someone invented

RUDOLF CARNAP
[ 64 I
the new word "teavy" and maintained that there are things which
are teavy and things which are not teavy. In order to learn the
meaning of this word, we ask him about its criterion of application:
how is one to ascertain in a concrete case whether a given thing is
teavy or not? Let us suppose to begin with that we get no answer
from him: there are no empirical signs of teavyness, he says. In
that case we would deny the legitimacy of using this word. If the
person who uses the word says that all the same there are things
which are teavy and there are things which are not teavy, only it
remains for the weak, finite intellect of man an eternal secret which
things are teavy and which are not, we shall regilrd this as empty
verbiage. But perhaps he will assure us that he means, after all,
something by the word "teavy." But from this we only learn the
psychological fact that he associates some kind of images and feelings with the word. The word does not acquire a meaning through
such associations. If no criterion of application for the word is
stipulated, then nothing is asserted by the sentences in which it
occurs, they are but pseudo-statements,
Secondly, take the case when we are given a criterion of application for a new word, say "toovy"; in particular, let the sentence
"this thing is toovy" be true if and only if the thing is quadrangular (It
is irrelevant in this context whether the criterion is explicitly stated
or whether we derive it by observing the affirmative and the negative uses of the word). Then we will say: the word "toovy" is synonymous with the word "quadrangular." And we will not allow its
users to tell us that nevertheless they "intended" something else by
it than "quadrangular"; that though every quadrangular thing is also
toovy and conversely, this is only because quadrangularity is the
visible manifestation of toovyness, but that the latter itself is a
hidden, not itself observable property. We would reply that after
the criterion of application has been fixed, the synonymy of "toovy"
and "quadrangular" is likewise fixed, and that we are no further
at liberty to "intend" this or that by the word.
Let us briefly summarize the result of our analysis. Let "a" be
any word and "S(a)" the elementary sentence in which it occurs.
Then the sufficient and necessary condition for "a" being meaningful
may be @ven by each of the following formulations, which ultimately say the same thing:
1. The empirical criteria for a are known.
2. It has been stipulated from what protocol sentences "S(a)"
is deducible.

The Elin~inafiortof Metaphysics

kG51

3. The truth-conditions for "S(a)" are fixed.
4. The ~riethodof verificatiorz of "S(a)" is kn0wn.l

Many words of metaphysics, now, can be shown not to fulfill the
above requirement, and therefore to be devoid of meaning.
Let us take as an example the metaphysical term "principle"
(in the sense of principle of being, not principle of knowledge or
axiom). Various metaphysicians offer an answer to the question
which is the (highest) "principle of the world" (or of "things," of
"existence," of "being"), e.g. water, number, form, motion, life, the
spirit, the idea, the unconscious, activity, the good, and so forth. In
order to discover the meaning of the word "principle" in this metapliysical question we must ask the metaphysician under what conditions a statement of the form "x is the principle of y" would be
true and under what conditions it would be false. In other words:
we ask for the criteria of application or for the definition of the word
"principle." The metaphysician replies approximately as follows:
"x is the principle of y" is to mean "y arises out of x," "the being
of y rests on the being of x," "y exists by virtue of x" and so forth.
But these words are ambiguous and vague. Frequently they have a
clear meaning; e.g., we say of a thing or process y that it "arises out
of" x when we observe that things or processes of kind x are frequently or invariably followed by things or processes of kind y (causal
connection in the sense of a lawful succession). But the metaphysician
tells us that he does not mean this empirically observable relationship.
For in that case his metaphysical theses would be merely empirical
propositions of the same kind as those of physics. .The expression
"arising from" is not to mean here a relation of temporal and causal
sequence, which is what the word ordinarily means. Yet, no criterion
is specified for any other meaning. Consequently, the alleged "metaphysical" meaning, which the word is supposed to have here in contrast to the mentioned empirical meaning, does not exist. If we
reflect on the original meaning of the word "principium" (and of the
we notice the same development.
corresponding Greek word A&"),
The word is explicitly deprived of its original meaning "beginning";
it is not supposed to mean the temporally prior any more, but the
prior in some other, specifically metaphysical, respect. The criteria
for this "metaphysical respect," however, are lacking. In both cases,

--

1. I o r the logical and epistemological conception which underlies our exposition,
but can only briefly be intimated here, cf. Wittgenstein, Tractatus Logico-Philosophicu.~,1922, and Carnap, Der logische Aufbau der Welt, 1928.

RUDOLF CARNAP
[ 66 I
then, the word has been deprived of its earlier meaning without being
given a new meaning; there remains the word as an empty shell. From
an earlier period of significant use, it is still associatively connected
with various mental images; these in turn get associated with new
mental images and feelings in the new context of usage. But the word
does not thereby become meaningful; and it remains meaningless
as long as no method of verification can be described.
Another example is the word "God." Here we must, apart from
the variations of its usage within each domain, distinguish the
linguistic usage in three different contexts or historical epochs, which
how:ver overlap temporally. In its mythological use the word has
a clear meaning. It, or parallel words in other languages, is sometimes used to denote physical beings which are enthroned on Mount
Olympus, in Heaven or in Hades, and which are endowed with
power, wisdom, goodness and happiness to a greater or lesser extent.
Sometimes the word also refers to spiritual beings which, indeed,
do not have manlike bodies, yet manifest themselves nevertheless
somehow in the things or processes of the visible world and are
therefore empirically verifiable. In its metaphysical use, on the other
hand, the word "God" refers to something beyond experience. The
word is deliberately divested of its reference to a physical being or to
a spiritual being that is immanent in the physical. And as it is not
given a new meaning, it becomes meaningless. To be sure, it often
looks as though the word "God" had a meaning even in metaphysics.
But the defmitions which are set up prove on closer inspection to be
pseudo-definitions. They lead either to logically illegitimate combinations of words (of which we shall treat later) or to other metaphysical words (e.g. "primordial basis," "the absolute," "the unconditioned," "the autonomous," "the self-dependent" and so forth),
but in no case to the truth-conditions of its elementary sentences.
In the case of this word not even the first requirement of logic is met,
that is the requirement to specify its syntax, i.e. the form of its
occurrence in elementary sentences. An elementary sentence would
here have to be of the form "x is a God"; yet, the metaphysician
either rejects this form entirely without substituting another, or if
he accepts it he neglects to indicate the syntactical category of the
variable x. (Categories are, for example, material things, properties
of things, relations between things, numbers etc.).
The theological usage of the word "God" falls between its mythological and its metaphysical usage. There is no distinctive meaning
here, but an oscillation from one of the mentioned two uses to the
other. Several theologians have a clearly empirical (in our termin-

[ 67 1
ology, "mythological") concept of God. In this case there are no
pseudo-statements; but the disadvantage for the theologian lies in
the circumstance that according to this interpretation the statements
of theology are empirical and hence are subject to the judgment of
empirical science. The linguistic usage of other theologians is clearly
metaphysical. Others again do not speak in any definite way, whether
this is because they follow now this, now that linguistic usage, or
because they express themselves in terms whose usage is not clearly
classifiable since it tends towards both sides.
Just like the examined examples "principle" and "God," most of
the other specifically metaphysical terms are devoid of meaning, e.g.
"the Idea," "the Absolute," "the Unconditioned," "the Infinite,"
"the belng of being," "non-being," "thing in itself," "absolute spirit,"
"objective spirit," "essence," "being-in-itself," "being-in-and-foritself," "emanation," "manifestation," "articulation," "the Ego,"
"the non-Ego," etc. These expressions are in the same boat with
"teavy," our previously fabricated example. The metaphysician tells
us that empirical truth-conditions cannot be specified; 3 he adds that
nevertheless he "means" something, we know that this is merely an
allusion to associated images and feelings which, however, do not
bestow a meaning on the word. The alleged statements of metaphysics which contain such words have no sense, assert nothing, are
mere pseudo-statements. Into the explanation of their historical origin
we shall inquire later.
The Blitnitzation of Metaphysics

So far we have considered only those pseudo-statements which
contain a meaningless word. But there is a second kind of pseudostatement. They consist of meaningful words, but the words are put
together in such a way that nevertheless no meaning results. The
syntax of a language specifies which combinations of words are
admissible and which inadmissible. The grammatical syntax of
natural languages, however, does not fulfill the task of elimination of
senseless combinations of words in all cases. Let us take as examples
the following sequences of words:
1. "Caesar is and"
2. "Caesar is a prime number"
The word sequence (1) is formed countersyntactically; the rules
of syntax require that the third position be occupied, not by a
conjunction, but by a predicate, hence by a noun (with article) or by
an adjective. The word sequence "Caesar is a general," e.g., is

[ 68 1
RUDOLF CARNAP
formed in accordance with the rules of syntax. It is a meaningful
word sequence, a genuine sentence. But, now, word sequence (2) is
likewise syntactically correct, for it has the same grammatical form as
the sentence just mentioned. Nevertheless ( 2 ) is meaningless. "Prime
number" is a predicate of numbers; it can be neither affirmed nor
denied of a person. Since ( 2 ) looks like a statement yet is not a
statement, does not assert anything, expresses neither a true nor a
false proposition, we call this word sequence a "pseudo-statement."
The fact that the rules of grammatical syntax are not violated easily
seduces one at first glance into the erroneous opinion that one still
has to do with a statement, albeit a false one. But "a is a prime
number" is false if and only if a is divisible by a natural number
different from a and from 1; evidently it is illicit to put here "Caesar"
for "a." This example has been so chosen that the nonsense is
easily detectable. Many so-called statements of metaphysics are not
so easily recognized to be pseudo-statements. The fact that natural
languages allow the formation of meaningless sequences of words
without violating the rules of grammar, indicates that grammatical
syntax is, from a logical point of view, inadequate. If grammatical
syntax corresponded exactly to logical syntax, pseudo-statements could
not arise. If grammatical syntax differentiated not only the wordcategories of nouns, adjectives, verbs, conjunctions etc., but within
each of these categories made the further distinctions that are
logically indispensable, then, no pseudo-statements could be formed.
If, e.g., nouns were grammatically subdivided into several kinds of
words, according as they designated properties of physical objects,
of numbers etc., then the words "general" and "prime number"
would belong to grammatically different word-categories, and (2)
would be just as linguistically incorrect as (1). In a correctly constructed language, therefore, all nonsensical sequences of words
would be of the kind of example (1). Considerations of grammar
would already eliminate them as it were automatically; i.e. in order
to avoid nonsense, it would be unnecessary to pay attention to
the meanings of the individual words over and above their syntactical type (their "syntactical categoly," e.g. thing, property
of things, relation between things, number, property of numbers,
relation between numbers, and so forth). It follows that if our
thesis that the statements of metaphysics are pseudo-statements
is justifiable, then metaphysics could not even be expressed in a
logically constructed language. This is the great philosophical importance of the task, which at present occupies the logicians, of
building a logical syntax.

The Elinzir~ation of Metaphysics

[ 69

I

Let us now take a look at some examples of metaphysical pseudostatements of a kind where the violation of logical syntax is especially
obvious, though they accord with historical-grammatical syntax. We
select a few sentences from that metaphysical school which at present
exerts the strongest influence in G e r n ~ a n y . ~
"What is to be investigated is being only and-nothing
else;
being alone and further-nothing; solely being, and beyond beingnothing. What about this Nothing? . . . Does the Nothing exist only
because the Not, i.e. the Negation, exists? Or is it the other way
around? Does Negation and the Not exist only because the Nothing
exists? . . . We assert: the Nothing is prior to the Not and the Negation. . . . Where do we seek the Nothing? How do we find the
Nothing. . . . We know the Nothing. . . . Anxiety reveals the Nothing.
. . . That for which and because of which we were anxious, was
'really'-nothing.
Indeed: the Nothing itself-as such-was present.
. . . What about this Nothing?-The Nothing itself nothings."
In order to show that the possibility of forming pseudo-statements
is based on a logical defect of language, we set up the schema below.
The sentences under I are grammatically as well as logically impeccable, hence meaningful. The sentences under I1 (excepting B3)
are in grammatical respects perfectly analogous to those under I.
Sentence form IIA (as question and answer) does not, indeed, satisfy
the requirements to be imposed on a logically correct language. But
it is nevertheless meaningful, because it is translatable into correct
language. This is shown by sentence 1119, which has the same meaning as IIA. Sentence form IIA then proves to be undesirable because
we can be led from it, by means of grammatically faultless operations,
to the meaningless sentence forms IIB, which are taken from the
above quotation. These forms cannot even be constructed in the
correct language of Column 111. Nonetheless, their nonsensicality is
not obvious at first glance, because one is easily deceived by the
analogy with the meaningful sentences IB. The fault of our language
identified here lies, therefore, in the circumstance that, in contrast
to a logically correct language, it admits of the same grammatical
form for meaningful and meaningless word sequences. To each
sentence in words we have added a corresponding formula in the
2. The following quotations (original italics) are taken from M. Heidegger,
lYas 1st Metaphysik? 1929. We could just as well have selected passages from any

other of the numerous metaphysicians of the present or of the past; yet the selected
passages seem to us to illustrate our thesis especially well.

[ 70 1
RUDOLF CARNAP
notation of symbolic logic; these formulae facilitate recognition of
the undesirable analogy between IA and IIA and therewith of the
origin of the meaningless constructions IIB.
1.

II.

III.

Meanirtgful
Sentences of
Ordinary
Language

Trarwition from
Sense to
Nortsertse in
Ordinary
Language

Logically
Correct
Lartgtrage

A. What is outside?

ou(?)
Rain is outside
Ou(r)

A. What is outside?

Ou(?)
Nothing is outside
Ou(no)

B. What about this rain? B. "What about this
(i.e. what does the
Nothing?" ?(no)
rain do? or: what
else can be said
about this rain?
?(r)
1. We know the rain

K(r)

A. There is nothing
(does not exist anything) which is
outside.
--tax) .OU(X)
B. None of these forms

can even be
constructed.

1. "We seek the

Nothing"

"We find the

Nothing"
"We know the
Nothing"
K(no)
2. The rain rains
R(r)

2. "The Nothing

nothings"
No(no)
3. "The Nothing

exists only .
because . . ."
Ex (no)
On closer inspection of the pseudo-statements under IIB, we also
find some differences. The construction of sentence (1) is simply
based on the mistake of employing the word "nothing" as a noun,
because .it is customary in ordinary language to use it in this form in
order to construct a negative existential statement (see IIA). In
a correct language, on the other hand, it is not a particular izame,
but a certain logical form of the sentence that serves this purpose

(see 111.4). Sentence IIB2 adds something new, viz. the fabrication
of the meaningless word "to nothing." This sentence, therefore, is
senseless for a twofold reason. We pointed out before that the meaningless words of metaphysics usually owe their origin to the fact
that a meaningful word is deprived of its meaning through its metaphorical use in metaphysics. But here we confront one of those rare
cases where a new word is introduced which never had a meaning
to begin with. Likewise sentence IIB3 must be rejected for two reasons. In respect of the error of using the word "nothing" as a noun,
it is like the previous sentences. But in addition it involves a contradiction. For even if it were admissible to introduce "nothing" as
a name or description of an entity, still the existence of this entity
would be denied in its very definition, whereas sentence (3) goes on
to a ~ r m
its existence. This sentence, therefore, would be contradictory, hence absurd, even if it were not already meaningless.
In view of the gross logical errors which we find in sentences
IIB, we might be led to conjecture that perhaps the word "nothing"
has in Heidegger's treatise a meaning entirely different from the
customary one. And this presumption is further strengthened as we
go on to read there that anxiety reveals the Nothing, that the Nothing
itself is present as such in anxiety. For here the word "nothing" seems
to refer to a certain emotional constitution, possibly of a religious
sort, or something or other that underlies such emotions. If such
were the case, then the mentioned logical errors in sentences IIB
would not be committed. But the first sentence of the quotation
at the beginning of this section proves that this interpretation is not
possible. The combination of "only" and "nothing else" shows unmistakably that the word "nothing" here has the usual meaning of
a logical particle that serves for the formulation o£ a negative existential statement. This introduction of the word "nothing" is then
immediately followed by the leading question of the treatise: "What
about this Nothing?".
But our doubts as to a possible misinterpretation get completely
dissolved as we note that the author of the treatise is clearly aware
of the conflict between his questions and statements, and logic.
"Question and answer in regard to the Nothing are equally absurd
in themselves. . . The fundamental rule of thinking commonly
appealed to, the law of prohibited contradiction, general 'logic,'
destroys this question." All the worse for logic! We must abolish its
sovereignty: "If thus the power of the understanding in the field of
questions concerning Nothing and Being is broken, then the fate of
the sovereignty of 'logic' within philosophy is thereby decided as

.

[ 72 1
RUDOLP CARNAP
well. The very idea of 'logic' dissolves in the whirl of a more basic
questioning." But will sober science condone the whirl of counterlogical questioning? To this question too there is a ready answer:
"The alleged sobriety and superiority of science becorrles ridiculous
if it does not take the Nothing seriously." Thus we find here a good
confirmation of our thesis; a metaphysician himself here states that
his questions and answers are irreconcilable with logic and the scientific way of thinking.
The difference between our thesis and that of the earlier antimetaphysicians should now be clear. We do not regard metaphysics
as "mere speculation" or "fairy tales." The statements of a fairy
tale d o not conflict with logic, but only with experience; they are
perfectly meaningful, although false. Metaphysics is not "superstition"; it is possible to believe true and false propositions, but not
to believe meaningless sequences of words. Metaphysical statements
are not even acceptable as "working hypotheses"; for an hypothesis
must be capable of entering into relations of deducibility with (true
or false) empirical statements, which is just what pseudo-statements
cannot do.
With reference to the so-called limitation of human knowledge
an attempt is sometimes made to save metaphysics by raising the
following objection: metaphysical statements are not, indeed, verifiable by man nor by any other finite being; nevertheless they might
be construed as conjectures about the answers which a being with
higher or even perfect powers of knowledge would make to our
questions, and as such conjectures they would, after all, be meaningful. To counter this objection, let us consider the following. If
the meaning of a word cannot be specified, or if the sequence of
words does not accord with the rules of syntax, then one has riot
even asked a question. (Just think of the pesudo-questions: "Is this
table teavy?", "is the number 7 holy?", "which numbers are darker,
the even or the odd ones?"). Where there is no question, not even
an omniscient being can give an answer. Now the objector may say:
just as one who can see may communicate new knowledge to the
blind, so a higher being might perhaps communicate to us metaphysical knowledge, e.g. whether the visible world is the manifestation of a spirit. Here we must reflect on the meaning of "new knowledge." It is, indeed, conceivable that we might encounter animals
who tell us about a new sense. If these beings were to prove to us
Fermat's theorem or were to invent a new physical instrument or
were to establish a hitherto unknown law of nature, then our knowledge would be increased with their help. For this sort of thing we

The Elimirlatiorz of Metaphysics

1731

can test, just the way even a blind man can understand and test the
whole of physics (and therewith any statement made by those who
can see). But if those hypothetical beings tell us something which
we cannot verify, then we cannot understand it either; in that case
no information has been comtnunicated to us, but mere verbal sounds
devoid of meaning though possibly associated with images. It follows that our knowledge can only be quantitatively enlarged by
other beings, no matter whether they know more or less or everything, but no knowledge of an essentially different kind can be
added. What we do not know for certain, we may come to know with
greater certainty through the assistance of other beings; but what
is unintelligible, meaningless for us, cannot become meaningful
through someone else's assistance, however vast his knowledge might
be. Therefore no god and no devil can give us metaphysical knowledge.

The examples of metaphysical statements which we have analyzed were all taken from just one treatise. But our results apply with
equal validity, in part even in verbally identical ways, to other metaphysical systems. That treatise is completely in the right in citing
approvingly a statement by Hegel ("pure Being and pure Nothing,
therefore, are one and the same"). The metaphysics of Hegel has
exactly the same logical character as this modem system of metaphysics. And the same holds for the rest of the metaphysical systems,
though the kind of phraseology and therewith the kind of logical
errors that occur in them deviate more or less from the kind that
occurs in the examples we discussed.
It should not be necessary here to adduce further examples of
specific metaphysical sentences in diverse systems and submit them
to analysis. We confine ourselves to an indication of the most frequent kinds of errors.
Perhaps the majority of the logical mistakes that are committed
when pseudo-statements are made, are based on the logical faults
infecting the use of the word "to be" in our language (and of the
corresponding words in other languages, at least in most European
languages). The first fault is the ambiguity of the word "to be." It
is sometimes used as copula prefixed to a predicate ("I am hungry"),
sometimes to designate existence ("I am"). This mistake is aggravated by the fact that metaphysicians often are not clear about
this ambiguity. The second fault lies in the form of the verb in its
second meaning, the meaning of existence. The verbal form feigns

[741

RUDOLF CARNAP

a predicate where there is none. To be sure, it has been known for
a long time that existence is not a property (cf. Kant's refutation
of the ontological proof of the existence of God). But it was not
until the advent of modern logic that full consistency on this point
was reached: the syntactical form in which modern logic introduces
the sign for existence is such that it cannot, like a predicate, be applied to signs for objects, but only to predicates (cf. e.g. sentence
IIIA in the above table). Most metaphysicians since antiquity have
allowed themselves to be seduced into pseudo-statements by the
verbal, and therewith the predicative form of the word "to be," e.g.
"I am," "God is."
We meet an illustration of this error in Descartes' "cogito, ergo
sum." Let us disregard here the material objections that have been
raised against the premise-viz. whether the sentence "I think" adequately expresses the intended state of affairs or contains perhaps an
hypostasis-and consider the two sentences only from the formalIogical point of view. We notice at once two essential logical mistakes. The first lies in the conclusion "I am." The verb "to be" is
undoubtedly meant in the sense of existence here; for a copula canaot be used without predicate; indeed, Descartes' "I am" has always
been interpreted in this sense. But in that case this sentence violates
the above-mentioned logical rule that existence can be predicated
only in conjunction with a predicate, not in conjunction with a name
(subject, proper name). An existential statement does not have
the form "a exists" (as in "I am," i.e. "I exist"), but "there exists
something of such and such a kind." The second error lies in the
transition from "I think" to "I exist." If from the statement "P(a)"
("a has the property P") an existential statement is to be deduced,
then the latter can assert existence only with respect to the predicate
P, not with respect to the subject a of the premise. What follows
from "I am a European" is not "I exist," but "a European exists."
What follows from "I think" is not ''I am" but "there exists something that thinks."
The circumstance that our languages express existence by a verb
('to be" or "to exist") is not in itself a logical fault; it is only inappropriate, dangerous. The verbal form easily misleads us into the
misconception that existence is a predicate. One then arri-:es at such
logically incorrect and hence senseless modes of expression as were
just examined. Likewise such forrlls as "Being" or "Not-Being,"
which from time immemorial have played a great role in metaphysics,
have the same origin. In a logically correct language such forms cannot even be constructed. It appears that in the Latin and the German

l h e Eli~ninationof Metaphysics

[7S]

languages the forms "ens" or "das Seiende" were, perhaps under the
seductive influence of the Greek example, introduced specifically for
use by metaphysicians; in this way the language deteriorated logically
whereas the addition was believed to represent an improvement.
Another very frequent violation of logical syntax is the so-called
"type curlfusion" of concepts. While the previously mentioned mistake consists in the predicative use of a symbol with non-predicative
meaning, in this case a predicate is, indeed, used as predicate yet as
predicate of a different type. We have here a violation of the rules
of the so-called theory of types. An altificial example is the sentence
we discussed earlier: "Caesar is a prime number." Names of persons
and names of numbers belong to different logical types, and so do
accordingly predicates of persons (e.g. "general") and predicates of
numbers ("prime number"). The error of type confusion is, unlike
the previously discussed usage of the verb "to be," not the prerogative of metaphysics but already occurs very often in conversational
language also. But here it rarely leads to nonsense. The typicd
ambiguity of words is here of such a kind that it can be easily removed.
Example: 1. 'This table is larger than that." 2. "The height of this table
is larger than the height of that table." Here the word "larger" is used in
(1) for a relation between objects, in (2) for a relation between numbers, hence for two distinct syntactical categories. The mistake is
here unimportant; it could, e.g., be eliminated by writing "largerl" and
"larger2"; "largerl" is then defined in terms of "larger2" by declaring
statement form (1) to be synonymous with (2) (and others of a similar
kind).
Since the confusion of types causes no harm in conversational
language, it is usually ignored entirely. This is, indeed, expedient for
the ordinary use of language, but has had unfortunate consequences
in metaphysics. Here the conditioning by everyday language has led
to confusions of types which, unlike those in everyday language, are
no longer translatable into logically correct form. Pseudo-statements
of this kind are encountered in especially large quantity, e.g., in the
writings of Hegel and Heidegger. The latter has adopted many peculiarities of the Hegelian idiom along with their Iogical faults (e.g.
predicates which should be applied to objects of a certain sort are
instead applied to predicates of these objects or to "being" or to
"existence" or to a relation between these objects).
Having found that many metaphysical statements are meaningless, we confront the question whether there is not perhaps a core
of meaningful statements in metaphysics which would remain after
elimination of all the meaningless ones.

[ 76 1
RUDOLF CARNAP
Indeed, the results we have obtained so far might give rise to
the view that there are many dangers of falling into nonsense in
metaphysics, and that one must accordingly endeavor to avoid these
traps with great care if one wants to do metaphysics. But actually
the situation is that meaningful metaphysical statements are impossible. This follows from the task which metaphysics sets itself: to
discover and formulate a kind of knowledge which is not accessible
to empirical science,
We have seen earlier that the meaning of a statement lies in the
method of its verification. A statement asserts only so much as is
verifiable with respect to it. Therefore a sentence can be used only
to assert an empirical proposition, if indeed it is used to assert anything at all. If something were to lie, in principle, beyond possible
experience, it could be neither said nor thought nor asked.
(Meaningful) statements are divided into the followi~lgkinds.
First there are statements which are true solely by virtue of their
form ("tautologies" according to Wittgenstein; they correspond approximately to Kant's "analytic judgments"). They say nothing
about reality. The formulae of logic and mathematics are of this
kind. They are not themselves factual statements, but serve for the
transformation of such statements. Secondly there are the negations of
such statements ("contradictions"). They are self-contradictory,
hence false by virtue of their form. With respect to all other statements the decision about truth or falsehood lies in the protocol sentences. They are therefore (true or false) empirical statements and
belong to the domain of empirical science. Any statement one desires
to construct which does not fall within these categories becolnes
automatically meaningless. Since metaphysics does not want to assert
analytic propositions, nor to fall within the domain of empiricaI
science, it is compelled to employ words for which no criteria of
application are specified and which are therefore devoid of sense,
or else to combine meaningful words in such a way that neither an
analytic (or contradictory) statement nor an empirical statement is
produced. In either case pseudo-statements are the inevitable product.
Logical analysis, then, pronounces the verdict of meaninglessness on any alleged knowledge that pretends to reach above or behind
experience. This verdict hits, in the first place, any speculative metaphysics, any alleged knowledge by pure thinking or by pure itltuitioit
that pretends to be able to do without experience. But the verdict
equally applies to the kind of metaphysics which, starting from experience, wants to acquire knowledge about that which transceilds
experience by means of special inferences (e.g. the neo-vitalist thesis

The Elinzinatio~zof Metaphysics
[771
of the directive presence of an "entelechy" in organic processes, which
supposedly cannot be understood in terms of physics; the question
concerning the "essence of causality," transcending the ascertainment of certain regularities of succession; the talk about the "thing
in itself"). Further, the same judgment must be passed on all philosoplty of norms, or philosophy of value, on any ethics or esthetics as
a normative discipline. For the objective validity of a value or norm
is (even on the view of the philosophers of value) not empirically
verifiable nor deducible from empirical statements; hence it cannot
be asserted (in a meaningful statement) at all. In other words: Either
empirical criteria are indicated for the use of "good" and "beautiful" and the rest of the predicates that are employed in the normative
sciences, or they are not. In the first case, a statement containing
such a predicate turns into a factual judgment, but not a value judgment; in the second case, it becomes a pseudo-statement. It is altogether impossible to make a statement that expresses a value judgment.
Finally, the verdict of meaninglessness also hits those metaphysical movements which are usually called, improperly, epistemological movements, that is realism (insofar as it claims t o say more
than the empirical fact that the sequence of events exhibits a certain
regularity, which makes the application of the inductive method possible) and its opponents: subjective idealism, solipsism, phenomenalism, and positivism (in the earlier sense).
But what, then, is left over for philosophy, if all statements whatever that assert something are of an empirical nature and belong to
factual science? What remains is not statements, nor a theory, nor
a system, but only a method: the method of logical analysis. The
foregoing discussion has illustrated the negative application of this
method: in that context it serves to eliminate meaningless words,
meaningless pseudo-statements. In its positive use it serves to clarify
meaningful concepts and propositions, to lay logical foundations for
factual science and for mathematics. The negative application of the
method is necessary and important in the present historical situation.
But even in its present practice, the positive application is more
fertile. We cannot here discuss it in greater detail. It is the indicated
task of logical analysis, inquiry into logical foundations, that is meant
by "scientific philosophy" in contrast to metaphysics.
The question regarding the logical character of the statements
which we obtain as the result of a logical analysis, e.g. the statements occurring in this and other logical papers, can here be answered only tentatively: such statements are partly analytic, partly
empirical. For these statements about statements and parts of state-

[ 78 1
RUDOLF CARNAP
ments belong in part to pure metalogic (e.g. "a sequence consisting
of the existence-symbol and a noun, is not a sentence"), in part
to descriptive metalogic (e.g. "the word sequence at such and such
a place in such and such a book is meaningless"). Metalogic will
be discussed elsewhere. It will also be shown there that the metalogic
which speaks about the sentences of a given language can be formulated in that very language itself.

7. METAPHYSICS
AS EXPRESSION
OF
AN ATTITUDETOWARD LIFE
Our claim that the statements of metaphysics are entirely meaningless, that they do not assert anything, will leave even those who
agree intellectually with our results with a painful feeling of strangeness: how could it be explained that so many men in all ages and
nations, among them eminent minds, spent so much energy, nay
veritable fervor, on metaphysics if the latter consisted of nothing
but mere words, nonsensically juxtaposed? And how could one account for the fact that metaphysical books have exerted such a strong
influence on readers up to the present day, if they contained not even
errors, but nothing at all? These doubts are justified since metaphysics
does indeed have a content; only it is not theoretical content. The
(pseudo)statements of metaphysics do not serve for the description
of states o f aflairs, neither existing ones (in that case they would be
true statements) nor nonexisting ones (in that case they would be
at least false statements). They serve for the expression o f the Penera1 attitude of a person towards life ("~ebensiinstellung, ~ e b i n s gefiihl")
.
perhaps we may assume that metaphysics originated from mythology. The child is angry at the "wicked table" which hurt him.
Primitive man endeavors to conciliate the threatening demon of
earthquakes, or he worships the deity of the fertile rains in gratitude.
Here we confront personifications of natural phenomena, which are
the quasi-poetic expression of man's emotional relationship to his
environment. The heritage of mythology is bequeathed on the one
hand to poetry, which produces and intensifies the effects of mythology on life in a deliberate way; on the other hand, it is handed down
to theology, which develops mythology into a system. Which, now,
is the historical role of metaphysics? Perhaps we may regar,d it as a
substitute for theology on the level of systematic, conceptdal thinking. The (supposedly) transcendent sources of knowledge of theology are here replaced by natural, yet supposedly trans-empirical

The Elirninatiort of Metaphysics
[79 1
sources of knowledge. On closer inspection the same content as that
of mythology is here still recognizable behind the repeatedly varied
dressing: we find that metaphysics also arises from the need to give
expression to a man's attitude in life, his emotional and voiitional
reaction to the environment, to society, to the tasks to which he
devotes himself, to the misfortunes that befall him. This attitude
manifests itself, unconsciously as a rule, in everything a man does
or says. It also impresses itself on his facial features, perhaps even
on the character of his gait. Many people, now, feel a desire to
create over and above these manifestations a special expression of
their attitude, through which it might become visible in a more succinct and penetrating way. I£ they have artistic talent they areGable
to express tllemselves by producing a work of art. Many writers
have already clarified the way in which the basic attitude is manifested through the style and manner of a work of art (e.g. Dilthey
and his students). [In this connection the term "world view" ("Weltanschauung") is often used; we prefer to avoid it because of its
ambiguity, which blurs the difference between attitude and theory,
a difference which is of decisive importance for our analysis.] What
is here essential for our considerations is only the fact that art is an
adequate, metaphysics an inadequate means for the expression of the
basic attitude. Of course, there need be no intrinsic objection to one's
using any means of expression one l i e s . But in the case of metaphysics we find this situation: through the form of its works it pretends to be something that it is not. The form in question is that
of a system of statements which are apparently related as premises
and conclusions, that is, the form of a theory. In this way the fiction
of theoretical content is generated, whereas, as we have seen, there
is no such content. It is not only the' reader, but the metaphysician
himself who suffers from the illusion that tlie.metaphysica1 statements say something, describe states of affairs. The metaphysician
believes that he travels in territory in which truth and falsehood are
at stake. In reality, however, he has not asserted anything, but only
expressed something, like an artist. That the metaphysician is thus
deluding himself cannot be inferred from the fact that he selects
language as the medium of expression and declarative sentences as
the form of expression; for lyrical poets do the same without succumbing to self-delusion. But the metaphysician supports his statements by arguments, he claims assent to their content, he polemicizes
against metaphysicians of divergent persuasion by attempting to
refute their assertions in his treatise. Lyrical poets, on the other hand,
do not try to refute in their poem the statements in a poem by some

RUDOLF CARNAP
[ 80 I
other lyrical poet; for they know they are in the domain of art and
not in the domain of theory.
Perhaps music is the purest means of expression of the basic
attitude because it is entirely free from any reference to objects. The
harmonious feeling or attitude, which the metaphysician tries to express in a monistic system, is more clearly expressed in the music
of Mozart. And when a metaphysician gives verbal expression to
his dualistic-heroic attitude towards life in a dualistic system, is it not
perhaps because he lacks the ability of a Beethoven to express this
attitude in an adequate medium? Metaphysicians are musicians without musical ability. Instead they have a strong inclination to work
within the medium of the theoretical, to connect concepts and
thoughts. Now, instead of activating, on the one hand, this inclination in the domain of science, and satisfying, on the other hand, the
need for expression in art, the metaphysician confuses the two and
produces a structure which achieves nothing for knowledge and something inadequate for the expression of attitude.
Our conjecture that metaphysics is a substitute, albeit an inadequate one, for art, seems to be further confirmed by the fact that
the metaphysician who perhaps had artistic talent to the highest
degree, viz. Nietzsche, almost entirely avoided the error of that confusion. A Large part of his work has predominantly empirical content. We find there, for instance, historical analyses of specific artistic
phenomena, or an historical-psychological analysis of morals. In the
work, however, in which he expresses most strongly that which others
express through metaphysics or ethics, in Thus Spake Zarathrtstra,
he does not choose the misleading theoretical form, but openly the
form of art, of poetry.

REMARKS BY THE AUTHOR (1957)
T o section I , "metaphysics." This term is used in this paper, as
usually in Europe, for the field of alleged knowledge of the essence of
things which transcends the realm of empirically founded, inductive
science. Metaphysics in this sense includes systems like those of Fichte,
Schelling, Hegel, Bergson, Heidegger. But it does not include endeavors
towards a synthesis and generalization of the results of the various
sciences.
T o section I, "meaning." Today we distinguish various kinds of
meaning, in particular cognitive (designative, referential) meaning on
the one hand, and non-cognitive (expressive) meaning components,
e.g. emotive and motivative, on the other. In the present paper, the word

The Elirnilzation of Metaphysics

[811

"meaning" is always understood in the sense of "cognitive meaning."
The thesis that the sentences of metaphysics are meaningless, is thus to
be understood in the sense that they have no cognitive meaning, no assertive content. The obvious psychological fact that they have expressive
meaning is thereby not denied; this is explicitly stated in Section 7.
T o sectiott 6 , "metalogic." This term refers to the theory of expressions of a language and, in particular, of their logical relations. Today
we would distinguish between logical syntax as the theory of purely
formal relations and semantics as the theory of meaning and truthconditions.
To section 6, realism and idealism. That both the a m a t i v e and the
negative theses concerning the reality of the external world are pseudostatements, I have tried to show in the monograph Scheinprobleme in
der Philosophie: D m Fremdpsychische urld der Realismusstreit, Berlin,
1928. The similar nature of the ontological theses about the reality or
unreality of abstract entities, e.g., properties, relations, propositions, is
discussed in "Empiricism, Semantics, and Ontology," Revue Intern. de
Plzilos. 4 , 1950, 20-40, reprinted in: Meaning and Necessity, second edition, Chicago, 1956.