system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The myth that humans only use 10% of the brain. How is it incorrect?

With the new movie coming out and this myth being talked about a lot, can anyone explain exactly how it's wrong?
gpt
When you point at something, you only use 10% of your fingers.  Obviously, that doesn't mean only 1 of your fingers is functional, just that your other nine fingers aren't needed for that activity.  Also, it doesn't mean using 100% of your fingers to point at something would make you "better" at pointing, you would just look like a weirdo trying to cast some kind of wizard spell.