variants:
or 20/20
Definition of twenty-twenty
1
of the human eye
: meeting a standard of normal visual acuity
twenty-twenty vision
2
: marked by facilely accurate discernment, judgment, or assessment
hindsight is twenty-twenty
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Merriam-Webster unabridged
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Time Traveler for twenty-twenty
The first known use of twenty-twenty was in 1875
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