内容简介：n Decisive, Chip and Dan Heath draw on decades of psychological research to explain why we so often get it very badly wrong - why our supposedly rational brains are frequently tripped up by powerful biases and wishful thinking. At the same time they demonstrate how relatively easy it is to avoid the pitfalls and find the best answers, offering four simple principles that we can all learn and follow. In the process, they show why it is that experts frequently make mistakes.