While the naive reasoning that the Sun has risen on thousands of times makes it likely it will rise again, the scientific reasoning is to construct a theory of gravity, deduce the dynamics of the Solar system and predict the future evolution of the bodies within it. This is what leads to the scientific prediction that the Sun will rise tomorrow.
No, no--you are confused. The sun isn't "coming up", the horizon is moving down.
Race IS a social construction but that doesn't prevent it being also genetic and cultural heritage. Normally, social constructions are interpretations of real things and not of fantasies.
Except for Diogenes, perhaps. Everything in that neck of the woods is based on his fantasies.