He attributes the mental illness of Dwayne Hoover and society at large to an abundance of "bad chemicals" in the brain which, when combined with bad ideas, formed "the Yin and Yang of madness." This idea, that humans are no more than machines, is contained within the novel Kilgore Trout gives to Dwayne Hoover. Both Trout and Vonnegut realize the power of bad ideas, with Vonnegut remarking how "natural it was for to behave so abominably, and with such abominable results: They were doing their best to live like people invented in story books. This was the reason Americans shot each other so often: it was a convenient literary device for ending short stories and books." The view of humans as biological machines, initially accepted by Vonnegut, is counteracted by Rabo Karabekian, the abstract artist who suggests "Our awareness is all that is alive and maybe sacred in any of us. Everything else about us is dead machinery."