“I’m not asking people to completely overhaul all decision-making, to ignore data or to reject facts. But, whether in the bar or the boardroom, I would like just 20 per cent of conversational time to be reserved for the consideration of alternative explanations, acknowledging the possibility that the real ‘why’ differs from the official ‘why’, and that our evolved rationality is very different from the economic idea of rationality.” Note this is (as far as we can tell) the US version and title, published in the UK as ‘Alchemy: The Surprising Power of Ideas That Don't Make Sense’.