When the bicameral mind speaks, there is no introspection.

As the world grew more complicated, this "bicameral mind" broke down.

Jaynes's theories on consciousness and the bicameral mind proved highly controversial.

Were they, perhaps, always one person - the bicameral mind reified as two separate people for the sake of the story?

Instead of having meta-consciousness, these humans were constituted by what Jaynes calls the "bicameral mind".

Jaynes's theories on consciousness and the bicameral mind are controversial.

"Wait a minute," yelled Klein, "I just figured out how to reconcile Western religion and the bicameral mind."

It was probable that they had once been organic, spined, warm-blooded land-dwellers with bicameral minds.

Most of them did not have bicameral minds and thus could not be made to hear mysterious voices.

Were they or something like them the secret agents who had bridged Jaynes' "bicameral mind" to create our current form of consciousness?