There is one simple hard fact: shorter code is faster to read and understand, period. If someone doesn't understand what the result of `o != Unknown` is then they should probably go back and read more about programming. Sorry to sound a bit condescending.
I would’ve written a shorter letter if I had more time.
I’ve also noticed people don’t want to think through Boolean logic enough to write things legibly. Or the other extreme is way too many Boolean operators on a line where it gets very hard to parse. Even worse when there are multiple cases like that in one function