When a subject recurred, we felt it as familiar, but indistinct: almost always it came up (that is, felt worth discussing again) only after we could no longer remember exactly what our previous respective opinions had been—we remembered vaguely, unattributively, the telling points that had been made the last time, but often reversed our positions, each of us more enthusiastic now about the fresher-feeling arguments the other had made the last time, and less convinced by our own earlier ones.
