In Jan ’09 I wrote: This is now my best account of disagreement. We disagree because we explain our own conclusions via detailed context (e.g., arguments, analysis, and evidence), and others’ conclusions via coarse stable traits (e.g., demographics, interests, biases). While we know abstractly that we also have stable relevant traits, and they have detailed context, we simply assume we have taken that into account, when we have in fact done no such thing.