[woodandsteel]

>The short version is that any theory of observations (i.e., scientific theory) necessarily defines the observational process and therefore the observations themselves, so that it is impossible to separate an explanation from its explanandum.

What I am saying is that all the different scientific theories are ultimately based on a universal understanding of reality that is in turn due to the universal nature of the human organism and its engagements with the real world. That's why I included the last paragraph in my comment.