It would be sheer insanity for him to attack Russia at the same time he's fighting the Brits.

Taking that pill must have seemed sheer insanity in the cold grey light of afternoon.

It is indeed only one notch down from Scientology for sheer insanity.

The sheer insanity of a world where he could even be asked to do such a thing.

The idea that a single man might walk up and take a look for himself on foot was sheer insanity.

I consider it an act of sheer insanity to send this man on such a mission.

And hi such planning, to bypass planets of economic and strategic value was sheer insanity.

It was sheer insanity to send that bunch out there to tackle the curly wolves from the high country who worked for Bell.

He'd told himself that getting involved with her was sheer insanity.

Thus, for him to leave her everything was an act of sheer insanity.