Everyone has ability. Knowledge of possibilities is literally the only limiting factor in ability, all other things equal. You can do incredible things if you just knew about it and developed the neural pathways your brain literally is designed for. But you don't know about them, you haven't developed the neural pathways for them, therefore you think you can't do it. But you could if you have the capacity for doing all of it. The only limiting thing, really, is your ability to pattern match, which more things to pattern match against in your brain, the more things you can pull from to learn new things. Someone who can take their knowledge of piano and transfer that to guitar is as 'intelligent' as a person who can transfer knowledge from haskell to ocaml or from biology to chemistry or from history to politics.