I once landed on my face. I soon learned that it took much less effort for me to move on Mars than it did on Earth.

VOA: special.2010.07.10

So if we lower the synergy here, not only do I contribute less effort, but you know I contribute less effort, and therefore you contribute less effort and so on.

如果我们减少协同参数,不但我会少付出努力,而且你也知道我会少付出努力,因此你也会少付出努力,以此类推

耶鲁公开课 - 博弈论课程节选