@jmtd

Heh. I am reminded though of the record "I cannot be played on Record Player X" from Hofstadter's "Gödel, Escher, Bach" where the dialogue "Contracrostipunctus" introduces the idea that if a record player is of sufficiently high fidelity and power, it should be possible to create a record which causes the player to shake itself apart. If you can't, the player is insufficiently powerful. This then provides an introduction to Gödel's Incompleteness Theorem and the Halting Problem 🙂