  In the 1970's, philosophers contested Chomsky's use of the word  ‘know’ to describe speakers' relations to grammar,  arguing that unlike standard cases of propositional knowledge, most  speakers are utterly unaware of grammatical rules (e.g.,  “Anaphors are bound, and pronominals and R-expressions are free in their binding domains”) and many probably wouldn't  understand them even if told what they are (Stich 1971). In  response, Chomsky (e.g., 1980:92) began to use a technical term,  ‘cognize,’ to describe the speaker-grammar relation,  avoiding the philosophically loaded term, ‘knowledge.’