為什麼聰明人有時會做出非常糟糕的決定，特別是在緊要關頭？原因其實就在於人腦「隨腦搭載」的心智軟體。我們天生的能力確實不足以處理許多當前最急迫的問題，我們只看自己想看見的，而不是讓事實說話，而且我們會抱持錯誤的信念，即便不合理也無所謂。我們大多數人都寧可一想到什麼就去做，而不會先確切檢視眼前的證據，並運用在我們的決策過程上。

Why do smart people sometimes make appallingly bad decisions, especially when the stakes are high? It really comes down to the mental software hardwired into the human brain. We genuinely are not well equipped to deal with many of today's most pressing problem. We see the world we want to see rather than letting the facts speak for themselves. We also have no problems harboring false beliefs, even if irrational. And most of us would rather do whatever comes to mind first rather than properly calibrating the evidence at hand and applying that to our decision making.