I think this is broadly true, but not in the way a lot of other commentators mean. Explaining something in simple terms does not mean you _fully_ explain it. Y

I think this is broadly true, but not in the way a lot of other commentators mean. Explaining something in simple terms does not mean you _fully_ explain it. You explain the essence (or what you see as the essence) of the thing. Google search is: you type a question into a box and Google shows you the best answer. Google search is a lot more than that, of course, but if you can't "boil it down" you don't understand it. This is the top line of a git commit v.s. the comments you leave in the source code. You can spend months working on thousands of lines of code, bur if you can't describe it in a single sentence (while leaving a lot out!) it's a bad sign.