On the one hand, there arises the problem of the relations between the formal field and the transcendental field (and at this level all the empirical contents of knowledge are placed between parentheses and remain suspended from all validity); and, on the other hand, there arises the problem of the relations between thedomain of empiricity and the transcendental foundation of knowledge (in which case the pure order of the formal is set apart as non pertinent to any account of that region in which all experience, even that of the pure forms of thought, has its foundation).