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]
Words nearby twenty-twenty hindsight
twenty-third,
twenty-third amendment,
twenty-third psalm,
twenty-three,
twenty-twenty,
twenty-twenty hindsight,
twenty-two,
twenty20,
twentyfold,
twentymo,
twerk