前言 (Preface)

Through the course of a lifetime, a human makes a number of decisions, ranging from the most trivial ones that have almost no impact, to those that have life changing consequences. And almost always, these situations involve X number of options and Y number of criteria that they are judged on.

一生中，人类会做出许多决定，从几乎没有影响的最琐碎的决定，到会改变生活的后果的决定。 几乎总是这些情况涉及要对其进行判断的X个选项和Y个条件。