diff --git a/rust/ql/lib/codeql/rust/AstConsistency.qll b/rust/ql/lib/codeql/rust/AstConsistency.qll
index 525726999aab..f586080ab59b 100644
--- a/rust/ql/lib/codeql/rust/AstConsistency.qll
+++ b/rust/ql/lib/codeql/rust/AstConsistency.qll
@@ -5,12 +5,14 @@
 private import rust
 private import codeql.rust.elements.internal.generated.ParentChild
 
+private predicate multipleToStrings(Element e) { strictcount(e.toString()) > 1 }
+
 /**
  * Holds if `e` has more than one `toString()` result.
  */
 query predicate multipleToStrings(Element e, string s) {
-  s = strictconcat(e.toString(), ", ") and
-  strictcount(e.toString()) > 1
+  multipleToStrings(e) and
+  s = strictconcat(e.toString(), ", ")
 }
 
 /**
@@ -18,22 +20,26 @@ query predicate multipleToStrings(Element e, string s) {
  */
 query predicate multipleLocations(Locatable e) { strictcount(e.getLocation()) > 1 }
 
+private predicate multiplePrimaryQlClasses(Element e) { strictcount(e.getAPrimaryQlClass()) > 1 }
+
 /**
  * Holds if `e` has more than one `getPrimaryQlClasses()` result.
  */
 query predicate multiplePrimaryQlClasses(Element e, string s) {
-  s = strictconcat(e.getPrimaryQlClasses(), ", ") and
-  strictcount(e.getAPrimaryQlClass()) > 1
+  multiplePrimaryQlClasses(e) and
+  s = strictconcat(e.getPrimaryQlClasses(), ", ")
 }
 
 private Element getParent(Element child) { child = getChildAndAccessor(result, _, _) }
 
+private predicate multipleParents(Element child) { strictcount(getParent(child)) > 1 }
+
 /**
  * Holds if `child` has more than one AST parent.
  */
 query predicate multipleParents(Element child, Element parent) {
-  parent = getParent(child) and
-  strictcount(getParent(child)) > 1
+  multipleParents(child) and
+  parent = getParent(child)
 }
 
 /**
@@ -42,14 +48,14 @@ query predicate multipleParents(Element child, Element parent) {
 int getAstInconsistencyCounts(string type) {
   // total results from all the AST consistency query predicates.
   type = "Multiple toStrings" and
-  result = count(Element e | multipleToStrings(e, _) | e)
+  result = count(Element e | multipleToStrings(e) | e)
   or
   type = "Multiple locations" and
   result = count(Element e | multipleLocations(e) | e)
   or
   type = "Multiple primary QL classes" and
-  result = count(Element e | multiplePrimaryQlClasses(e, _) | e)
+  result = count(Element e | multiplePrimaryQlClasses(e) | e)
   or
   type = "Multiple parents" and
-  result = count(Element e | multipleParents(e, _) | e)
+  result = count(Element e | multipleParents(e) | e)
 }
diff --git a/rust/ql/lib/codeql/rust/controlflow/internal/CfgConsistency.qll b/rust/ql/lib/codeql/rust/controlflow/internal/CfgConsistency.qll
index 378062e16b41..668533f1c3dd 100644
--- a/rust/ql/lib/codeql/rust/controlflow/internal/CfgConsistency.qll
+++ b/rust/ql/lib/codeql/rust/controlflow/internal/CfgConsistency.qll
@@ -9,11 +9,7 @@ private import codeql.rust.controlflow.ControlFlowGraph
 private import codeql.rust.controlflow.internal.ControlFlowGraphImpl as CfgImpl
 private import codeql.rust.controlflow.internal.Completion
 
-/**
- * All `Expr` nodes are `PostOrderTree`s
- */
-query predicate nonPostOrderExpr(Expr e, string cls) {
-  cls = e.getPrimaryQlClasses() and
+private predicate nonPostOrderExpr(Expr e) {
   not e instanceof LetExpr and
   not e instanceof ParenExpr and
   exists(AstNode last, Completion c |
@@ -23,6 +19,14 @@ query predicate nonPostOrderExpr(Expr e, string cls) {
   )
 }
 
+/**
+ * All `Expr` nodes are `PostOrderTree`s
+ */
+query predicate nonPostOrderExpr(Expr e, string cls) {
+  nonPostOrderExpr(e) and
+  cls = e.getPrimaryQlClasses()
+}
+
 /**
  * Holds if CFG scope `scope` lacks an initial AST node.  Overrides shared consistency predicate.
  */
@@ -84,11 +88,11 @@ int getCfgInconsistencyCounts(string type) {
   result = count(CfgImpl::SplitKind sk | nonUniqueListOrder(sk, _) | sk)
   or
   type = "Multiple toStrings" and
-  result = count(CfgNode n | multipleToString(n, _) | n)
+  result = count(CfgNode n | multipleToString(n) | n)
   or
   type = "CFG scope lacks initial AST node" and
   result = count(CfgScope s | scopeNoFirst(s) | s)
   or
   type = "Non-PostOrderTree Expr node" and
-  result = count(Expr e | nonPostOrderExpr(e, _) | e)
+  result = count(Expr e | nonPostOrderExpr(e) | e)
 }
diff --git a/shared/controlflow/codeql/controlflow/Cfg.qll b/shared/controlflow/codeql/controlflow/Cfg.qll
index be05a5695a95..4130920daf67 100644
--- a/shared/controlflow/codeql/controlflow/Cfg.qll
+++ b/shared/controlflow/codeql/controlflow/Cfg.qll
@@ -1502,10 +1502,13 @@ module MakeWithSplitting<
       strictcount(sk.getListOrder()) > 1
     }
 
+    /** Holds if `n` has multiple textual representations. */
+    predicate multipleToString(Node n) { strictcount(n.toString()) > 1 }
+
     /** Holds if `n` has multiple textual representations. */
     query predicate multipleToString(Node n, string s) {
-      s = strictconcat(n.toString(), ",") and
-      strictcount(n.toString()) > 1
+      multipleToString(n) and
+      s = strictconcat(n.toString(), ",")
     }
 
     /** Holds if CFG scope `scope` lacks an initial AST node. */