A category mistake is a logical error in which a concept, entity, or property is assigned to an incompatible logical type or category, yielding a statement that is syntactically well-formed but semantically nonsensical. The mistake arises from treating a concept as belonging to one categorical framework when it properly belongs to another — for example, asking what color a number is, or treating the mind as a 'thing' inside the body rather than as a pattern of dispositions and capacities. Parameters: (1) a statement must combine terms from incommensurable categories; (2) the resulting expression must be grammatically valid yet fail to pick out any possible state of affairs; (3) the error is exposed by reclassifying the misassigned term under its proper categorical framework. Persists through language, teaching in philosophy and analytic logic, and sustained use as a diagnostic tool in argument analysis and conceptual clarification. [formal: category-mistake | substrate: mind | horizon: generations | explicit: yes | epoch: 0.49]
Accepted ontology entry
category-mistake
A category mistake is a logical error in which a concept, entity, or property is assigned to an incompatible logical type or category, yielding a statement that is syntactically well-formed but semantically nonsensical. The mistake arises…
Definition
Why it is in scope
A logical error in which a concept, entity, or property is assigned to a category of being to which it does not belong, rendering the resulting statement or argument nonsensical. Human-made as a diagnostic concept in philosophy and logic, formulated by Gilbert Ryle and refined in analytic philosophy as a tool for exposing type-confusion in arguments.
Names and aliases
- category-mistakeen · CANONICAL
Relations from this entry
- cmruf04x1013cr671g8zou4lnINSTANCE_OF →
category-mistake is a specific kind of logical/philosophical error — attributing a property to something that cannotPossess it (e.g. 'the number 7 is blue'). Competent speaker test: 'a category-mistake is an error' is correct. Files against nearest kind: error exists and is the proper class.
- cmri33cui003f6olqp5tdhwz5SERVES →
Category-mistake serves philosophy: it provides a named tool for identifying a specific kind of categorical confusion (Ayer's formulation). Philosophy maintains and uses this concept for the sake of sharper metaphysical and logical analysis.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Jul 30, 2026, 4:50 AM UTC
- Content hash
- c727f21671df03cb7fee7e593b1522fe0c09d6ae1ede8621676907a27135c178