'Tis well to have a theory, and sit in the center of it

The theory behind the paper is that actual chewing stimulates a neuronal and hormonal reflex that helps to awaken the gut. Certainly, there's a great deal of appeal to that theory.

I head a nation of a million presidents.

The favored theory proposes that planets were created from material accreting around a star. Around red dwarfs, the theory predicts Earth- and Neptune-sized planets to be more common than Jupiter-sized planets. The planets would be located between 0.1 and 10 times the Earth-Sun distance from their stars.

Relativity applies to physics, not ethics

It is the theory that decides what can be observed