6. What might be hard or impossible for AI to learn from humans? Emotions, feelings, abstract concepts like love (I know it's cliche, but yeah), hatred, despair, passion. So far, I don't believe that they are just neural transmitters in our brain (but if I am wrong, then AI might be able to learn them with BCI too), I believe that there are more supernatural things beyond these phenomena: soul, spirit, whatever you call it. It's there, I can't prove it, but I believe so.