The existence of a god, if we are to believe in it, can only be established through reason.

Their existence, to the extent that anything can be said to exist, has already been established.

He also established the existence of an equilibrium using a novel approach.

They argue that such cases establish the existence of discrimination.

Augustine established the existence of the soul as a thinking and willing being.

The existence of a critical period of language development is well established.

The existence of such laws may, according to Cumberland, be established in two ways.

"The existence of ghosts has never been established," he said in a telephone interview last week.

However, its existence was never firmly established, and today it is believed not to exist.

"The Mafia's continued existence is pretty well established by its continuing activities."