Reminds me of Yasha Berchenko-Kogan’s excellent answer to the question “What do grad students in math do all day?”
https://www.quora.com/Mathematics/What-do-grad-students-in-m...
> a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.
> What can you say?
> "It is a tool that does suck up dust to make what you walk on in a home tidy."