Here are some possible discussion topics to get you started. If you're thinking of something I've overlooked, jump in$.$ Which of these models seem to make the most sense?Do some seem to work better than others?What should we do if different models lead to different conclusions?What should we do if the same model leads to different conclusions? For example, $2$ utilitarians can completely agree about what the facts, costs, and benefits are, and disagree about whether the benefits are enough to make the costs worthwhile.Is there any way to decide which model is "best" for a given situation?And, of course... why should $($or shouldn't$)$ Batman kill the Joker?