twenty-twenty hindsight

[Jonathan Lighter]

OED has a cite calling this "new" in 1962.

1952 Norman C. Meier & Harold W. Saunders, eds. _The Polls and Public
Opinion_ (N.Y.: Holt) 333 [GB Snippet: looks genuine, not verified]:  Gallup
and Crossley and Roper and others were just not in shape to have that
*twenty-twenty
hindsight* beforehand.

1958 Rep. Henry A. Dixon, in _Salt Lake Tribune_ (Oct. 4) 22 [NewspArch]:
Twenty-twenty hindsight regarding national security is easy.

JL

--
"If the truth is half as bad as I think it is, you can't handle the truth."

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