The new medication proved to be efficacious in treating the disease.

The DNA evidence was definitive in proving his innocence.

The new business venture proved to be highly lucrative.

He was chopping logic to prove his point.

That day proved to be the turning point in his career.

She proved herself yet again by winning the competition.

The proving ground is where new theories and equipment are tested.

She proved to be false-hearted and betrayed her friends.

He provided evidence to prove his bona fides.

His plan seemed to be too difficult, but before long it proved to be feasible.