A priori knowledge of the categorial concepts in a Kantian sense is a priori because, in deploying ordinary empirical descriptive talk, one must already have a mastery of what you need to do in order to use the categorial concepts.
A priori knowledge of the categorial concepts in a Kantian sense is a priori because, in deploying ordinary empirical descriptive talk, one must already have a mastery of what you need to do in order to use the categorial concepts.