Paul McCartney can’t read or write music.

Musicians like McCartney are known in the industry as ‘hummers’ for their ability to create new music by humming the tune and reproducing it with musical instruments, rather than recording the notes on conventional music sheets. This type of composing takes an astonishingly intuitive feel for music, not to mention an outstanding memory.

“I don’t see music as dots on a page. It’s something in my head that goes on,” the legendary musician told 60 Minutes.