When the train came to my stop I had to walk by his seat again on my way out. “Glad we could come to a peaceful coexistence,” I said as I passed. He raised a finger to stay me a moment. “There are no conflicts of interest,” he pronounced, “between rational men.” This sounded like a questionable proposition to me, but I appreciated the conciliatory gesture. The quote turns out to be from Ayn Rand. I told you we talked like this in the Quiet Car.