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

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

He is an expert in probability theory.

A DD debate is unfolding between him and her.

He is writing a thesis on the yellow peril.

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

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

Learning about the ancient special kana usage is very important for understanding ancient Japanese.

The Jōdai Tokushu Kanazukai is one of the notation methods of ancient Japan.

He is an expert in theoretical physics.