Comment by CrazyStat

The Secretary Problem tells us that once you’ve lived 1/e (~37%, 30ish years) of your life[1], the next time you see something that’s stupider than everything you’ve seen before there’s a 1/e chance that’s it’s the stupidest thing you’ll ever see.

[1] Strictly speaking it would be 1/e of your stupidity sightings, which may not be 1/e of your life. If you intend to retire early and become a hermit you may want to stop the exploration phase earlier.