Epistemological Problems

" The most significant problems of physics are not of mathematical deductive nature; most essential are those which relate to the main principles."
A. Einstein (letter to Besso)

this page will be always unfinished
2014 : new questions .

Let us begin this page by a question : during twenty years I have always been very deceived by the reading of works which are supposed to inform the common run of people on science, the scientific knowledge, the philosophy of sciences, etc... The dustbin often seemed to me the only worthy place to receive these pages. However, I did not know why. It is a breath of fresh air which I inspire, when per moments, a text informs me on this path of the comprehension of scientific knowledge, this path which always seemed to me bordered of nauseous drains, muddy fields and other turpitudes.
It is owl to see a beautiful rainbow. Some references:
An analysis of the situation.
" La chauve-souris et la chouette, petite spectroscopie de la philosophie des sciences " in " La pierre de touche ", Jean-Marc Lévy-Leblond, (Gallimard 1996).

A poetic glance.
" Malicorne " of Hubert Reeves.

Concepts which emergent.
" La vérification " of Gilles-Gaston Granger (O Jacob 1992).

Not to confuse the mathematical sign R4 and the physical symbol R4
In other words
Not to confuse a physical space time V and variety pseudo-riemannian V associated.