doesn't that also apply for the maths-> physics layer? id say maths is the bottom layer
yet there are problems there too we do not know the "true axioms of math", people disagree (math foundations)
Maths lacks the physical grounding, so in that sense, it's less "real", and more "made up", even though of course it's so pure.
yet there are problems there too we do not know the "true axioms of math", people disagree (math foundations)