google.com, pub-0418880821635173, DIRECT, f08c47fec0942fa0 World of Proverbs: Fool me once, shame on you; fool me twice, shame on me. ~ English Proverb, American [16574]


Fool me once, shame on you; fool me twice, shame on me.
~ English Proverb, American [16574]

George W. Bush gives us a slightly different version:

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