I made it as far as my first internship before I learned what `!val` meant. Don't ding people (especially interns or juniors) for not knowing specifics or notat

I made it as far as my first internship before I learned what `!val` meant. Don't ding people (especially interns or juniors) for not knowing specifics or notation, or things that can be answered in a single google. What matters is what they do when they learn what `i++` is - does it ever come up again, and do they understand it.