He is a pure utilitarian, all his actions are based on the pursuit of profit.

He always looks at things like a pessimist.

He is always an optimist, believing in a bright future even in difficult situations.

He is a positivist who thinks based on scientific evidence.

He considers himself an existentialist.

He is a true pragmatist, valuing practice over theory.

He claims to be a true democrat at heart.

He is a true optimist, always believing in a bright future.

My sister is a vegetarian and does not eat meat at all.

He is known as an absolutist in politics.