They speak of consciousness. Our brain scans show the electrochemical activities inside their brains, and then they speak of a felt sensation of consciousness; but the relationship between the two, conducted as it is on the quantum level (if their mentation works like ours does), is not amenable to investigation from outside. It remains a matter of postulates, made in sentences uttered to each other. They tell each other what they are thinking. But there is no reason to believe anything they say.

