how can you argue with this?

My Gfs friend is over and they are talking about a girl they know. Aparently this girl is crazy and heavily medicated. So I'm not paying really attention but I just heard her say " But, like, what if she gets like, one of those guns that like kill babies, a shotgun or whatever and like kills him in his sleep?"
How do you even start an inteligent argument with someone like this?
How do you even start an inteligent argument with someone like this?