Conceptual activity is a normative activity, consisting in using or exercising rules which are functional in the formation of language, particularly judgments and propositions. Concepts, the essential elements of propositional content, are not to be considered as simple properties or predicates, but instead as constituting the rules of correct judgment. Two aspects of these claims are to be underlined. First, the dimension of normativity: the concept itself is a rule, a mode of functioning of understanding. Second, the notion of understanding (...) as disposition to judgment. Anyone who expresses a judgment exercises a certain responsibility, an implicit or explicit endorsement of a rule. (shrink)