He believes in teleology, thinking that there is a meaning in every event.

Morphology is a part of linguistics that studies the structure of words.

Syntax is a branch of linguistics.

He is majoring in syntax at university.

His idea is pure armchair theory and cannot be applied to real-world problems.

He is writing a thesis on the yellow peril.

Christology is a part of Christian theology that studies the nature and role of Jesus Christ.

He is an expert in probability theory.

A DD debate is unfolding between him and her.

Category theory is a branch of mathematics that studies structures and their relationships.