Let us try one possible answer to these questions: (1) We have a concept of X when we know the definition of the word "X." But this answer is far too narrow: we do know the meanings of countless words cat 31 run above and use them every day without being able to state a definition for them. We observed on pp. 67-76 why this is so. Whatever having a concept involves, it does not require being able to state a definition something that even the compilers of dictionaries often have a hard time doing. And in the case of words like "red" that are not verbally definable at all, we can never state a definition-from which we would have to conclude, according to this view, that we can never have a concept of red.