2,419 followers
@VanDammeEDU @CAEnews @etec_sa Oh, what is the Tower of Hanoi puzzle: https://t.co/lPRxcchvPL That kind of problem was used already in the thirties by psychologists like Karl Duncker 1935 https://t.co/ZVuYOBsekF (previews of reprint 1974)