[ksdale]

Does the fact that people digest food differently make a difference? I feel like the way food is digested is "knowable" in a way that physics is knowable, we just don't have adequate tools to measure all the complexity yet. As opposed to lots of things about sociology being "unknowable," like Asimov's Foundation being fantasy (probably).

In any case, I was attempting to make the point that hard science and soft science are anything but settled categories, which seems borne out by the responses.