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twenty-twenty hindsight

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twenty-twenty hindsight

Knowledge after the fact, as in With twenty-twenty hindsight, I wouldn't have bought these tickets. This idiom uses twenty-twenty in the optometrist's sense, that is, "indicating normal vision," and hindsight in the sense of "looking back" or "reconsidering." [First half of 1900s]

See also: hindsight

twenty-twenty hindsight

and 20/20 hindsight

n. an ability to figure out what one should have done after it is too late to do it. Everybody has twenty-twenty hindsight!

See also: hindsight