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]
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Nearby words
twenty-third, twenty-third amendment, twenty-third psalm, twenty-three, twenty-twenty, twenty-twenty hindsight, twenty-two, twenty20, twentyfold, twentymo, twerk
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.