Good point. I think the biggest way he’s changed my mind is by helping me understand the ways in which other people’s perspectives and default modes of thinking may differ. I have a tendency to see the exchange of ideas as an argument to win (partly a product of my personality, partly a product of my years doing competitive debate). Spencer’s approach in conversation, writing, and tools on Clearer Thinking emphasize the mode of discovering how other people think about the world. His work has also pushed me to examine my own bias, particularly on political issues.