He didn't want his friend involved in a case that could not be definitely proven.

The possibility of such control was, however, definitely proven by the results the machines had given them.

So until your status is definitely proven to be human, you should not leave.

The Oh family said that language definitely proved the existence of intelligent life.

Like the old saying goes, two is better than one, as is definitely proven here.

The presence of a Roman settlement has been not definitely proven.

Frequency Unknown definitely proves a few things, but none of them are positive.

I couldn't definitely prove his innocence except by proving someone else was guilty.

Some art historian have supposed that another church existed on the site before, but this has not been definitely proven.

He was determined to prove definitely to his own satisfaction that I was all right.