In this week’s episode of Office Hours, I sit down with Harvard psychologist and bestselling author @sapinker to talk about common knowledge, the shared understanding that shapes how we cooperate, communicate, and find meaning. We explore how laughter turns private thoughts into shared truths, why silence fuels division, and what social science can teach us about honesty, trust, and happiness. We also cover how common knowledge shapes our politics and culture, the hidden power of eye contact and