The intrepid Typescript developer will find several types that, frankly, make no sense whatsoever in real life. A “string” or “number” is perfectly reasonable, but what is an “unknown” or “never” type? More importantly, what in the world is a “keyof never”?

According to GitHub, I’ve written approximately 6,000 lines of code over the course of the past four months (welcome to grad school!). The question is, can I explain all of the stuff I wrote?