He believed his theory and it shook him.

But he believes his false theory *only* because he doesn't know about the ansible.

So they don't believe my theory, he consoled himself.

If they believed her theory, there was no way they could ever know what was inside the asteroid.

It was doubly hard for me because I half believed Brian's theory.

Despite the conferences, few believed the government's theory.

You don't believe Hennes's theory about my complicity in all this?

She had come to believe almost his theory of the future, since it was not repugnant to her prejudices.

Still couldn't prove it, but she believed her theory enough to launch a last exhaustive sprint to finish the time machine.

Most scientists did not believe Wegener's theory and thought it was foolish.