“The unknown that is at stake in research is neither an object nor a subject. The speech relation in which the unknown articulates itself is a relation of infinity. Hence it follows that the form in which this relation is realized must in one way or another have an index of “curvature” such that the relations of A to B will never be direct, symmetrical, or reversible, will not form a whole, and will not take place in a same time; they will be, then, neither contemporaneous nor commensurable.”