  In this short presentation, we address two somewhat separate issues. The
first one deals with the establishment (vs discovery) of what we call "physical
laws". The discussion runs on a "successive approximations" approach, suited to
our own thinking process, and aiming at the "simplest \emph{possible}
formulation ", as opposed to the idea of pre-existing laws to be discovered. In
the second part, we review briefly an approach to the (observed) metric
originating from a short distance fractal structure, and remind how a
symmetrical situation can arise from mere re-summations.
