 But, like Kant’s idealist critic J.G. Fichte, Green thinks that this Kantian dualism is an unstable resting point between empirical realism and idealism. He believes that the consistent application of Kantian principles should lead to the rejection of things-in-themselves (PE  §41).[4]  Kant’s dualism is both unacceptable and unnecessary. It is unacceptable, because it leaves cognitive success a mystery.