Two
So you fun an experiment with the sole goal of wowing your parents with your GCSE results. You write down A*s on every flat surface, you visualise standing in the hall on results day, and you mentally obsess about this goal. You don't finish school with all the A*'s that you hoped but you get close (6 A's 2 b's a 1 c close). Nonetheless achieving this result is enough to prove to you that you in fact - created this result with your mind.