From playing 20 Questions and attempting to formalise it? EDIT: actually the cryptography connection is more likely: Leibniz was XVII; who was it that was alre

From playing 20 Questions and attempting to formalise it? EDIT: actually the cryptography connection is more likely: Leibniz was XVII; who was it that was already using binary alternatives for steganography a few centuries earlier? EDIT2: did entropy in p-chem come before or after Shannon? EDIT3: well before; S = k_B ln Ω was 1877.