This situation (in one sense minor, in another sense privileged) places them in relation to all the other forms of knowledge: they have the more or less deferred, but constant, aim of giving themselves, or in any case of utilizing, at one level or another, a mathematical formalization; they proceed in accordance with models or concepts borrowed from biology, economics, and the sciences of language; and they address themselves to that mode of being of man which philosophy is attempting to conceive at the level of radical finitude, whereas their aim is to traverse all its empirical manifestations.