To the point of "honest people": I added "honest" in editing to distinguish from people who are just arguing because they like fighting and wouldn't agree if you told them 2 + 2 = 4. There are plenty of those online too, and their reasons for disagreeing clearly aren't covered by my "reasons people disagree" principle.

But as I understood you, point taken. The distillation of principles, information, and interpretation into an opinion does not actually occur as idealized in my breakdown. I wouldn't disagree with that.