No one was willing to abandon a treaty when cheating could not be proved beyond a doubt.

CENTERFORSECURITYPOLICY: Center for Security Policy | A New Skepticism on Arms Control, By James T. HackettThe Washington Times, 18 October 1999

She was told the judge felt that on the basis of that evidence, it could not be proved beyond reasonable doubt that her memories were real.

BBC: 'Memories' of historic abuse leading to justice errors

Last year the Director of Public Prosecutions ruled out manslaughter charges, saying it could not be proved beyond reasonable doubt that Mr Tomlinson's death was caused by Pc Harwood pushing him to the ground.

BBC: UK police service 'transparent', says Sir Hugh Orde

No such luck, though, on Radio Foyle where I was cornered into giving a view that, whilst he's fought a strong campaign and proved beyond doubt what a safe pair of hands he has, John McCallister won't be able to overhaul Mike Nesbitt.

BBC: Prediction game for UUP leadership contest