At this point it is a matter of tracing, step by step, the forms of givenness Gegebenheiten in all their modifications the authentic and inauthentic; the simple and the synthetic; those constituted in one blow, so to speak, and those that, according to their essence, can only be built up gradu ally; those that are absolutely valid, and those that, in the process of cognition, only approach givenness and full validity in an infinite progression.