Harry Potter is a liar.
Knowing that you have done something has nothing to do with whether you can do it again.
“Oh Hermione, don’t you see? I stepped out of the bushes and risked both our sanities because I knew I could do an extremely difficult piece of magic in the future, so I know that I can do it now, because I’d already done it!”
“See, Harmy, you just did that floaty-bow-non-bumpy thing perfectly. Do it again.”
*makes huge squawky bow change*
“Hmm. You’re not trying. You just did it before. Try again. And keep your pinky over the fingerboard, for the 243rd time I have to tell you. And vibrate! And keep your fingers on the frog! And don’t do that swoopy slidy thing.”
*makes even huger squawky bow change*
*after seventeen tries, Harmy is suddenly able to play 2’s against 3’s exactly, as if she could always do it.”
“You got it! I’m supposed to be giving you a piano lesson, but uh..I had to eat, do my dishes, and feed my 3 cats–I’ll be right in. Do it again.”
*miserably fails and does a stupid uneven dotted attempt at 2/3’s*
Ahh, making fun of your own ineptitude is so relaxing. And a good way to avoid doing your Scarlet Letter essay.