At her Rationally Speaking podcast, Julia Galef talked to me about signaling as a broad theory of human behavior. Julia is smart and thoughtful, and fully engaged the idea. Even so, I’m not sure I convinced her. I might have had a better chance if we’d dived quickly into a detailed summaries of related datums. Instead we more talked more abstractly about her concern that signaling seems a complex theory, and shouldn’t we look to simpler theories first. For example, on the