Hindsight's 20/20 American proverb sentence
The word "Hindsight" means understanding after something has happened. 20/20 is a term in ophthalmology to mean good vision.
The phrase implies that looking back on what happened is easy for someone to understand.
Hindsight is 20/20. I should have listened to your advice.
We have realized his decision brought the company many problems, but hindsight's 20/20.
The phrase appeared in the 1900s.
To say, or believe something or someone that seems completely crazy, delusional, or stupid
You spent 1000$ on a new pair of shoes! It is insanely crazy. You need your head examined.