Axiom of categoricity
The axiom of categoricity is a term coined by J. K. Chambers in 1995 to refer to the once-widespread tenet of linguistic theory that in order to properly study language, linguistic data should be removed or abstracted from all real-world context so as to be free of any inconsistencies or variability. This principle was, for different theorists and schools of thought, taken as a prerequisite for linguistic theory, or as a self-evident falsehood to be rejected.