Sentence examples for this is folly from inspiring English sources

This is folly.

Wiser heads know this is folly.

This is folly on several accounts.

"This is folly in the extreme.

Many fiscal experts say this is folly.

This is folly but one pointing to a great opportunity.

This was folly, and so was Athens's refusal of yet another Spartan peace offer after the battle.

Only the hickories pretend this ebullience is folly.

"The appeal being made that science will resolve this problem is folly.

Against this backdrop, it is folly to act as if the private lawsuits attacking FDA warnings just backstop a porous and lax FDA.

For David Cameron to consign Britain to the back seat — if not the trunk — of the European car at this crucial moment is folly beyond words.