Wilhelm Dilthey is one of the authors who introduces the topic of the history in philosophy. This is a good judgment, though he finds many more questions. We believe that Polo answers them in a suitable manner.

This is a working paper, a discussion on the meaning that L. Polo gives to "synderesis". Starting from this notion, the transcendental and practical dimensions of the «I» are developed and explored.

L. Laudan proposes a rational method in order to properly analyse the development of Sciences. He also proposes an epistemology model. Both have been criticised because of their weak ground and their foreseeable results.

Man's cognoscitive acts study can improve a better understanding of intellectual habits. The sinderesys and conciensce notions are, in this way, notoriously lightened.