He is reading a book about the theory of evolution.

He analyzed the problem from the perspective of positivism.

He is an expert in syntax and has written many papers.

He strongly supports realism in philosophy.

Phonology is a branch of linguistics that studies the system of sounds and their functions.

He believes in creationism.

He learned about substantialism in his philosophy class.

He likes to take a walk in the park at dusk.

He is the type of person who thinks it's a moonlit night if it's bright, so he only has a one-sided perspective.

He thought deeply and said, 'I think, therefore I am.'