ABSTRACT
THERE will always be some conditions which must be presupposed in the claim that a certain concept is capable of application in judgments. In most cases, to claim that a judgment is correct presupposes that there is some particular satisfaction of these conditions. For example, to say that we can claim to make any correct judgments at all about physical objects requires that they should have causal relations to one another and to our sensibility. But, furthermore, to claim that some particular physical object can justifiably be said to exist is to presuppose that we can point to some particular satisfaction of these conditions: such as that we can see it, or that it has left a dent in the sand. I shall call concepts of which all this is true a-concepts.
