The Crowd in My Head | Mohamed Hassissi | TEDxENCGA

Picture [applause] a classroom. A teacher walks in, draws three lines on the board, obviously disproportionate in length. Line A, line B, line C.And he asks a very simple question, which line is the longest. And to you, obviously, line A is the longest. There's no question about that.But just as you're about to raise your hand and answer the question, something strange happens. All around you, your friends, your classmates, they start raising their hands and all of them answer C. You look at the board, you ...