Well, usually when a person shakes their head," said McGonagall coldly, "they mean 'no.' So unless Miss Edgecombe is using a form of sign language as yet unknown to humans.
J. K. RowlingThey donโt need walls and water to keep the prisoners in, not when theyโre trapped inside their own heads, incapable of a single cheerful thought. Most go mad within weeks - Lupin
J. K. RowlingWhere are you heading, if youโve got the choice?โ James lifted an invisible sword. โโGryffindor, where dwell the brave at heart!โ Like my dad.โ Snape made a small, disparaging noise. James turned on him. โGot a problem with that?โ โNo,โ said Snape, though his slight sneer said otherwise. โIf youโd rather be brawny than brainy โโ โWhereโre you hoping to go, seeing as youโre neither?โ interjected Sirius.
J. K. RowlingHe's a funny man, Dumbledore. I think he sort of wanted to give me a chance. I think he knows more or less everything that goes on here, you know. I reckon he had a pretty good idea we were going to try, and instead of stopping us, he just taught us enough to help. I don't think it was an accident he let me find out how the Mirror worked. It's almost like he thought I had the right to face Voldemort if I could.
J. K. Rowling