> It's not complicated, and the kind of thing that many others would have come up with soon enough anyway. Counterpoint: a lot of inventions seem obvious in re

> It's not complicated, and the kind of thing that many others would have come up with soon enough anyway. Counterpoint: a lot of inventions seem obvious in retrospect, especially if you've used them routinely for most of your life. Doesn't mean they were obvious at the time.