Sentence examples for foolproof systematic from inspiring English sources

Is there a foolproof, systematic way to buy up open spaces, or is it catch-as-catch-can?

This protection is virtually foolproof.

But is it foolproof?

Her recipes are foolproof.

No system is foolproof.

Systems aren't foolproof.

But nothing's foolproof.

I thought, 'Foolproof?

This recipe is foolproof.

Are they foolproof?

Foolproof, not idiot-proof.