I wish we'd stop confusing what we can prove with what is. Chances are not only all people are conscious and introspective, but most animals are to some degree

I wish we'd stop confusing what we can prove with what is. Chances are not only all people are conscious and introspective, but most animals are to some degree (it's not an on/off switch, it's an emergent property, the sum of all your reasoning skills). As for bicameralism, it's just a demonstration of the lengths at which our wrong assumptions can reach when the subject we're creating conjecture about (ancient people) are no longer around, or otherwise unable to explain themselves. There are plenty of people in the modern day, which claim to have heard the voice of god (or the devil, or aliens, or what have you), which might be a mental disturbance, or quite often is a simple confusion (a dream taken for reality, and so on). It's just how the mind works to this present day. Sometimes we misinterpret input and make up reasons. Heck, the theory of bicameralism seems like an example of making up reasons.