Relevant definitions:

b)1) all learning exclusive of technical precepts and practical arts. 2) the sciences and liberal arts exclusive of medicine, law and theology. c) a discipline comprising as its core logic, aesthetics, ethics, metaphysics, and epistemology.

2a) pursuit of wisdom. b) a search for a general understanding of values and reality by chiefly speculative rather than observational means. c) an analysis of the grounds of and concepts expressing fundamental beliefs.

3a) a system of philosophical concepts b) a theory underlying or regarding a sphere of activity or thought.

Can there be a theory underlying life, the universe and everything? How would it be testable? verifiable? What do the words mean?