How do you know that your parents, at least one of your parents satisfies the definition? Well I've reduced the problem from am I a natural born US citizen to is one of my parents a natural born US citizen?

这是一个递归的定义，你怎么知道你的父母,至少其中一个是满足天生的美国公民,这个定义的呢？,我已经把我是一个天生的美国公民这个问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

The Gallup poll shows the usual partisan divide over both the definition of the problem and potential solutions.

FORBES: Pledging Our Way To Fiscal Disaster

Each definition of the problem presumes a solution.

FORBES: SMAP: Solutions Masquerading as Problems

But what you can agree on is a definition of the problem, a framework for how to approach addressing the problem, and some targets and goals about how you achieve some accomplishments towards a solution.

WHITEHOUSE: Press Briefing