Cab drivers are living proof that practice does not make perfect

The burden of proof is on the defendant to show that the statements were true.

There's nothing to be afraid of in a clinical trial. I am a walking billboard. I am living proof that clinical trials work.

Rennie really is living proof of what MS is and how it can affect your life. By seeing her situation, I think it inspires people to get up and do something.

I've had no problems since then. Dad and me, we're both living proof.

This is living proof that there is an audience for South African film.