Prompt Title: Mlodinow on Subconscious Mind.

Yes, there is definitely a connection between the concept of a two-tiered brain and Sigmund Freud's concept of the unconscious mind, or "das Unbewusste" in German.

Freud's idea of the unconscious mind was that it contained thoughts, feelings, and memories that were not directly accessible to conscious awareness. He believed that the unconscious mind played a powerful role in shaping our behavior, often in ways that we were not aware of.

Similarly, the two-tiered brain model suggests that our behavior is influenced not only by our conscious thoughts and intentions, but also by unconscious processes that are not directly accessible to us. These unconscious processes may include automatic responses to stimuli, implicit biases, and other mental processes that occur without our conscious awareness.

Both Freud's concept of the unconscious mind and the two-tiered brain model suggest that our behavior is shaped by factors that are not fully within our control or awareness. They also suggest that gaining a better understanding of these unconscious processes can help us to better understand ourselves and our behavior.