Similar words: foolproof, formal proof, school principal, control program, proof, proofed, reproof, hip roof.
31 But this approach certainly is not fool-proof and often leads to error.
32 After getting burned once or twice for failing to cover some base, they develop a fool-proof routine to prevent that from happening again, then swear their eternal allegiance to it.
33 One way to deal with this problem is to develop fool-proof policies that are easy to implement and explain.
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