The answer to which came first. Scientifically speaking

With chaos as my suit, and madness as my scheme, I laugh when heroes fall, a terrifying dream. Who am I, the agent of anarchy's gleam?

I’ve got six pockets Four legs. And Sixteen balls that like to get smacked.

I am a quarter of a feeling, but four fifths of irony. I'm a part of your breakfast, just not the darjeeling, when it doubt, suss me out, with equine polarity.

Do you know what it's called when an old person calls you? No? Don't worry; it'll come to you.