"I think my performance over a long-term basis has proven out to be a pretty strong record."
But how well she would prove out remained to be seen.
Alas for both of us, the theory never proved out.
I have made the most complex calculations and the matter is now quite proved out.
"We've a very good team at home, but we'll have to prove it each and every time out."
The important thing is to keep this woman covered until she proves out, one way or the other.
They weren't the things he wanted to know, but still, the principle had proved out.
I'll bring in water and a can pretty soon; you're stuck here until the tests prove out.
His work proved out; it could have enormous academic impact.
He proves out to be very good, but things are not what they seem.