What is the ethical difference between the following situations? Also, what would be the ethical possible courses of action (or non-action) in each situation. A) Someone is going to shoot and kill some "innocent" person. You can stop him, but you have to kill him to do it. B) A boulder is rolling towards a group of people. It will kill them. You can divert the boulder so that it doesn't hit them, but you will have to divert the boulder onto a path where some other person is standing, and it will kill him if you do.