For if I am able to talk about 'dreams' and 'reality', to bother my head about the distinction between imaginary and real, and cast doubt upon the 'real', it is because this distinction is already made by me before any analysis; it is because I have an experience of the real as of the imaginary, and the problem then becomes one not of asking how critical thought can provide for itself secondary equivalents of this distinction, but of making explicit our primordial knowledge of the 'real', of describing our perception of the world as that upon which our idea of truth is forever based.