“Dad I’m at the ATM but I forgot the PIN. What is it?” “You forgot?? I distinctly remember telling you: Battle of Hastings minus the length of the Thirty Years

“Dad I’m at the ATM but I forgot the PIN. What is it?” “You forgot?? I distinctly remember telling you: Battle of Hastings minus the length of the Thirty Years’ War, plus the Battle of Ipsos. C’mon kid, pay attention” “...” “Sigh. 1337. That’s the PIN”