How Do We Come to Knowledge?

If we have a belief that is linked to our identity, the same parts of our brains fire up as they would if we have a physical threat. The ideological threat is there. And instead of listening or opening the door, we fortify,. We double down, we reinforce, and we batten down the hatches. That's really smart. So you actually sort of start in the shallower waters before you go after anything that someone might take personally.