I mean physics is the theoretical study of the universe, chemistry is the practical study of the universe. Literally studying the physical form and makeup and relationships of everything in the universe.
Edit: wrong post somehow, thats weird, my bad. Leaving this for posterity.
So you know how if you click the first link in a Wikipedia post you'll eventually get to philosophy? I assumed they were doing the opposite: starting their argument at philosophy and eventually getting to cheese.
Which is why you have to check for casein in products when vegan. Some products which have nothing to do with dairy add the casting just to give you a fix.