>>715790041
>but why have an in-depth discussion with a stranger
He had a captive (and possibly in his eyes, reasonable and noteworthy) audience and took his opportunity to talk about an important element of his life's work. He clearly likes to hear himself speak at length about his perspective on the world and probably desires some kind of feedback from someone close to being a peer. Although I doubt he can necessarily take genuinely negative criticism. One of his endings, as I recall, has him take Arcade as a hostage and he ends up having philosophical discussions with him, up until the day Arcade ropes himself; it's a part of his nature as a leader and orator, he appreciates having someone around worth speaking to.