The final year of the 20th century was 2000 (not 1999) but a person in their 20th year is 19 (not 20)

https://lemmy.world/post/24640056

The final year of the 20th century was 2000 (not 1999) but a person in their 20th year is 19 (not 20) - Lemmy.World

This one really did happen in the shower.

ngl, I have spent way too much time thinking about those very points 😅
Trust me, I did too. I got so lost in the puzzle than the shower ran cold.