5) Are spells invented or discovered? We see zero evidence that any wizard has ever had an inkling of curiosity about the fundamental nature of magic itself. Snape apparently created sectum sempra - did he... upload that to the leylines? or did he just go "wow, wave wand in this motion, say these words... conveniently, it works! i don't know why, but it'll work for you!" harry's too dumb to have ever invented a spell, surely, but hermione must have.