How to Roleplay Your Beliefs

Peter's belief is that his experience as a gender queer woman from a certain part of the country should carry more weight in this conversation than yours. People who hold beliefs because of their background, because of their privilege, because of skin colour, people like you. What would be the best way to call into question someone like my beliefs? Well, that's an example. My belief's in the problem of white privilege... I'm going to exclude you from my safe space. And if I listen to you, it will hurt me."