If this is true, no single theory can explain the function of the system as a whole.

These types differ so radically that no single theory can describe them all.

The eventual goal of science is to provide a single theory that describes the whole universe.

There is as yet no single accepted theory of language acquisition.

We divide our systems, believing that the world is too complex for a single theory to explain.

"It would force them to buy into a single theory of prosecution, perhaps before they are ready," I tell him.

As a group, Federal investigators have yet to settle on a single theory.

No single theory of pathogenesis has yet been accepted, however.

"It's not a seminar where you get to entertain a single grand theory."

The prosecutors had an obligation to decide on a single theory of the case before going to trial.