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If we meet an honest and intelligent politician, a dozen, a hundred, we say they aren't like politicians at all, and our category of politicians stays unchanged; we know what politicians are like.

Randall Jarrell (1965). “A sad heart at the supermarket: essays & fables”
If we meet an honest and intelligent politician, a dozen, a hundred, we say they aren't like politicians at all, and our category of politicians stays unchanged; we know what politicians are like.