From the LSA Inclusive Teaching Initiative, University of Michigan:

"Students may feel defensive in this activity and may defend the use of dialogue blockers. In the discussion of the reading 'Post Mortem: A Conversation Gone Wrong,' they may exhibit hostility toward the Black Woman and protectiveness over the white participants. As the discussion facilitator, you may need to redirect the conversation. Some suggestions for how to do that are imbedded in the discussion guide. You might also press them gently on their defensiveness or sympathy with the white participants."