If I can get you to laugh with me, you like me better, which makes you more open to my ideas. And if I can persuade you to laugh at the particular point I make, by laughing at it you acknowledge its truth.
如果我能让你和我一起笑，你会更喜欢我，这让你对我的想法更开放。如果我能说服你对我的观点一笑了之，你就会承认这是事实。