I'm Thinking About Killing My Brother, Right?

Kant: You have to be able to coherently will that the maxim behind your action could be a universal law. So here's the obvious one, i'm thinking about killing my brother. Well, what if that's the everybody? What if, actually, i should just say i'm thinkingabout killing somebody, right? If that was universal law, that everybody killed somebody, then everybody would be dead. And i think you can alize it to syes they lie in these hard situations. It's not e normative law of what we should do, but it's a descriptive law about what people actually do.