Other sources point out that no hard proof of such decision exists.

I don't have any hard proof- just a feeling that we need these folks to help us out.

There is no hard proof that sports vision therapy translates into better performance.

She had no hard proof, after all, to dispute the Duke's words.

There was no hard proof, but the lieutenant wasn't working up a case for trial.

But I do not want to call a man a murderer without very hard proof.

It wasn't my place and I had no hard proof.

But as serious scholars have long conceded, hard proof of the first 2,000 years is missing.

General Pace added that there was no hard proof pointing to other serious suspects.

American officials have no hard proof that the Sudan still provides training centers for international terrorists.