hindsight is 20/20

7.2

It is easy to see what you should have done after something happens

idiom

Informal

: el hindsight es perfecto

Looking back, I realize I should have invested earlier, but hindsight is 20/20.

Examples

We all make mistakes, and it's easy to judge decisions after the fact because hindsight is 20/20.
She regretted not preparing more for the exam, knowing that hindsight is 20/20.
In hindsight is 20/20, I should have taken that job offer.
They often say, hindsight is 20/20 after making mistakes.
After the project failed, I realized that hindsight is 20/20 and I should have addressed the team's concerns sooner.
Reflecting on my choices, I see that hindsight is 20/20 and I could have avoided those mistakes.
Many people think they would have acted differently, but hindsight is 20/20 in every situation.

Synonyms

twenty-twenty hindsight

vshindsight is 20/20

6.0

A clear understanding of what happened only after the event

is the same idea but phrased as a short proverb using numerals

Surface Forms

hindsight is 20/20 main

Morphology

hindsight + be + 20/20

If a learner knows 'hindsight' (understanding after an event) and the idiom '20/20' as meaning perfect clarity of vision, the sentence compositionally yields 'hindsight is perfectly clear' and thus the intended meaning that past events are easy to judge. The visual-clarity metaphor is common cross-linguistically and follows a straightforward identity construction ('hindsight is X'), so a B1 learner who knows the constituents can derive the meaning.

Etymology

Hindsight is 20/20 comes from the eye test where 20/20 means perfect sight and hindsight means looking back at what already happened. So when we look back things seem clear and it is easy to see what we should have done, which is why the phrase means 'it is easy to understand what you should have done after it happened'.