 CPR contains other discussions of the mind, discussions that remained the same in both editions. The appendix on what Kant called Leibniz’ Amphiboly contains the first explicit discussion of an important general metaphysical notion, numerical identity (being one object at and over time), and contains the first argument in CPR for the proposition that sensible input is needed for knowledge. (Kant asserts this many times earlier but assertion is not argument.) In the Antinomies, the discussion of the Second Antinomy contains some interesting remarks about the simplicity of the soul and there is a discussion of free will in the Solution to the Third Antinomy. The mind also appears a few times in the Doctrine of Method, particularly in a couple of glosses of the attack mounted against the Paralogisms. (A784=B812ff is perhaps the most interesting.)