"There is only one foolproof way to find out."

Fox, however, may have found a foolproof way to generate interest.

That is the only foolproof way of "sorting it all out in one go".

Otherwise, the most foolproof way of finding them is to drill small holes into the wall.

This would probably be the safest foolproof way to meet your needs.

They'd pay top dollar for a foolproof way of knowing that someone coming through their front door was carrying a gun.

There is, of course, a simple, foolproof way to protect yourself.

There is one foolproof way to rid yourself of this - take a cold shower.

Back then, Florida executed by hanging, which wasn't a foolproof way to kill people either.

Riding in water is far from a foolproof way to hide a trail.