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• Nothing is fool proof, fools are ingenious.
• Make it idiot proof and someone will make a better idiot.
• I idiot-proof my programs,but along comes a bigger idiot.
• Nothing is foolproof! Fools are too ingenious!
• THE BEST 1997 BUMPER STICKERS Jesus is coming, everyone look busy.
  Horn broken, watch for finger. Honk If You Haven't Slept With Bill Clinton....
• Nothing can be made foolproof, as fools are so ingenious.