One interesting thing that happened today was that we took the Tube one way and then we took it the other way and a lady got into an argument with Sibylla. Sibylla said let's take the example of two men about to be burned at the stake, A dies at time t of heart failure while B burns to death at time t + n, I think we can all agree that B's life would be better if it was n minutes shorter. The lady said she thought it was rather different and Sibylla said it was exactly the same and the lady said there was no need to shout ...