This Aristotelian method for classifying judgments is the basis for his own twelve corresponding concepts of the understanding. In deriving these concepts, he reasons roughly as follows. If we are to possess pure concepts of the understanding, they must relate to the logical forms of judgement. However, if these pure concepts are to be applied to intuition, they must have content. But the logical forms of judgement are by themselves abstract and contentless. Therefore, to determine the pure concepts of the understanding we must identify concepts which "both" correspond to the logical forms of judgement, "and" are able to play a role in organising intuition. Kant therefore attempts to extract from each of the logical forms of judgement a concept which relates to intuition. For example, corresponding to the logical form of "hypothetical" judgement ('If "p", then "q"'), there corresponds the category of causality ('If one event, then another'). Kant calls these pure concepts 'categories', echoing the Aristotelian notion of a category as a concept which is not derived from any more general concept. He follows a similar method for the other eleven categories, then represents them in the following table: