I have to agree with you David about your theory.

I've thought about theory of time, too, maybe more than you have.

You end up with no ideas about American history and political theory.

How about the theory that the difference is in the students?

However, this is not to say that nothing about the theory makes sense.

I don't know anything about the theory of time travel.

Sort of the, you know, here we're talking about the theory.

This is just the time for a long debate about the theory and practice of justice.

On the other hand, she wasn't ready to tell him about her crazy theory yet either.

He plans to write a book about the history and theory of democracy.