Ask HN: What are some of your favorite HN posts?

I recently saw another poster ask if HN has provided anyone with anything of value [0]. That got me wondering what a collection of everyone’s favorite HN posts would look like.

I’ll start:

The last question by Isaac Asimov - https://news.ycombinator.com/item?id=8376716

Temperature Conversion: Mental Calculation - https://news.ycombinator.com/item?id=20490666

Everything I know - https://news.ycombinator.com/item?id=25903596

[0] - https://news.ycombinator.com/item?id=26366538