Every response, whether it be an act directed towards the outside world or an act internalized as thought, takes the form of an adaptation or, better… - Jean Piaget

Alongside of the rare cases of true conversation where there is a genuine interchange of opinions or commands, one can observe in children between 2 and 6 a characteristic type of pseudo-conversation or "collective monologue", during which the children speak only for themselves, although they wish to be in the presence of interlocutors who will serve as a stimulus. Now here again, each feels himself to be in communion with the group because he is inwardly addressing the Adult who knows and understands everything, but here again, each is only concerned with himself, for lack of having dissociated the "ego" from the "socius".

Classical logic believed it was possible to discover the actual structure of thought processes, and the general structures underlying the external world as well as the normative laws of the mind . . . As logic has perfected its formal rigor, logicians have ceased to interest themselves in the study of actual thought processes.

I am convinced that there is no sort of boundary between the living and the mental or between the biological and the psychological. From the moment an organism takes account of a previous experience and adapts to a new situation, that very much resembles psychology.