> Plenty of engineers feel strongly about having a firm understanding of the systems they work with. It's not a bad feeling, but feeling that way doesn't magic

> Plenty of engineers feel strongly about having a firm understanding of the systems they work with. It's not a bad feeling, but feeling that way doesn't magically enable you hold all the nuances of the output of billions of lines of code in your head. I've noticed that most engineers would rather rewrite than firmly understand.