I just recieved an e-mail that claims to have originated with David Copperfield and it says he can read my mind. It shows five playing cards. It asks you to think of one card in the selection, then after a flash show it tells you what card you thought of. I picked the jack of clubs, which is what the e-mail said I picked.
I know a computer can’t read my mind and David Copperfield is likely busy with something else. I just want to know how this works because I hate being tricked.