More generally, you can have a fruitful discussion about a topic only if it doesn't engage the identities of any of the participants.

一般来讲，只要你的讨论不涉及参与者的身份认同，你是可以进行一场富有成效的讨论的。

There is nothing more satisfying like knowing that you have had a fruitful discussion with people who were ready to do the worse to you.

没有什么更令人满意想知道你有成果的讨论与人谁愿意做坏给你。