Although Sartre rejects a certain kind of idealism in "Truth and Existence", I argue that a commitment to a kind of transcendental idealism remains. I explore the expression of this idealism in "Truth and Existence" and how it enhances an idealist tradition which begins with Kant. More importantly, I examine Sartre's divergence from Kantian idealism and his blending of pragmatism with idealism, in a way most similar to Wittgenstein's. Unlike Wittgenstein's idealism, however, Sartre's idealism, I argue, brings him dangerously close (...) to solipsism and creates for his theory of truth a serious problem of cognitive splintering. (shrink)