Abstract
According to Kant our cognitive capacities result from synthetic functions _a priori, forming a complete and invariable system implemented into the human mind. From a Darwinian perspective such capacities are to be understood as genetic traits favored by selection, thus they are the variable components of contingent systems only. Kant intermingles two kinds of apriority: (1) Apriority as a result of inborn traits--judgments on this ground have only probability, not necessity; (2) Apriority as a result of the intentional construction of closed systems--judgments on this ground have necessity, but they are not universal constituents of the human mind