The Chain of Academia

I know XKCD.com has done well when my brain returns to it weeks later as I drift off to sleep. Here is the gist of a recent ponderable:

Sociology is just applied Psychology
Psychology is just applied Biology
Biology is just applied Chemistry
Chemistry is just applied Physics
Physics is just applied Mathematics

It left me wondering where the Arts fit in, if at all. Are literature, art, or even philosophy merely applied sociology? Perhaps they aren’t involved at all since they’re not SCIENCE.