twenty-twenty hindsight

Idioms  

1. 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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Example Sentences

Despite what cynics blessed with the gift of twenty-twenty hindsight might have you believe, Pele’s suggestion that Colombia would at least make the semi-finals of USA 94 wasn’t a crazy shot in the dark.

From The Guardian

Twenty-twenty hindsight is not required to conclude these losses were both probable and easily preventable.

From Forbes

"Twenty-twenty hindsight can always second guess the decisions of public health officials," said Jeffrey Levi, executive director of the Trust for America's Health, a private nonprofit group.

From Washington Post