Clear proof of the fragility of human goodness.

Referral fees must be banned, whiplash should no longer qualify for compensation, unless there's clear proof.

The reduction in the bird population was described as 'clear proof' of the damage caused to the natural environment by intensive farming.

It gives clear proof of their talent — by letting us see them turn a weak script into an enjoyable show.

On the other hand, there was clear proof of perjury and obstruction of justice which could be prosecuted in a relatively straightforward trial.