I've been thinking about how this happens with human cognitive development. There's a constant reinforcement mechanism that simply compares one's predicted reality with actual reality. The machines lack an authoritative reality.

If we had to grade truthiness of data sources - our sight or other main senses would probably be #1. Some gossip we heard from a 6 year old is near the bottom.

We know how to grade these data sources based on longitudinal experience and they are graded on multiple axes. For instance Angela is wrong about most facts but always right about matters of the heart.