  Vaihinger’s interpretive work during the 1880’s and 90’s did not extend to the other major part of the KrV, the Transcendental Dialectic. The PAO, however, includes a supplementary appendix in which Vaihinger lays out a novel interpretation of this chapter (PAO 201–35). The Dialectic was the part of the KrV that clearly had the most significant impact on Vaihinger’s own thought, and his interpretation of it is radical and interesting. It will therefore be worth briefly examining before turning to the main argument of the PAO. 