be the cause

See: generate
References in classic literature ?
It is impossible to feel sure th at she may not be the cause of some public scandal this time, which may affect her innocent sister as well as herself.
The true proposition, however, is in no way the cause of the being of the man, but the fact of the man's being does seem somehow to be the cause of the truth of the proposition, for the truth or falsity of the proposition depends on the fact of the man's being or not being.
Hypoxia and hypercapnia were felt to be the cause of hypersomnolence.