If fails when the mafia targets someone else.
For example, doctor protects person A but mafia attacks person B. The protection failed.
Doctor protects person A and mafia attacks person A. The protection is successful. And person A is still alive.
Also everyone knows everyone can do, because everything is in the first post.
For example, doctor protects person A but mafia attacks person B. The protection failed.
Doctor protects person A and mafia attacks person A. The protection is successful. And person A is still alive.
Also everyone knows everyone can do, because everything is in the first post.