Stuart A. Kauffman discusses the potential implications of quantum physics for understanding consciousness and free will. Key points include:
1. Quantum Biology: Kauffman suggests that quantum biology, including phenomena like light-harvesting molecules, bird navigation, and perhaps smell, challenges the idea of sticking solely to classical physics in biology.
2. Turing Machines and Syntactic Information: Turing Machines, which operate with discrete states (0,1) and discrete time (T, T+1), are based on classical physics and syntactic information. Kauffman argues that this framework may not fully capture the creative and non-computable aspects of the human mind.
3. Creativity and Metaphors: Kauffman emphasizes the creative nature of mathematics and the human mind, which goes beyond true/false propositions. He highlights the importance of metaphors, art, and language in human cognition.
4. Causal Closure and Free Will: Kauffman discusses the challenge posed by the causal closure of classical physics to the concept of free will. In classical physics, the present state determines the next state, leaving no room for the mind to influence the world.
5. Quantum Measurement and Free Will: Kauffman explores the idea that responsible free will could exist if quantum measurement is ontologically indeterminate. He mentions the Strong Free Will Theorem by John H. Conway and Simon Kochen as a possibility for responsible choice in a quantum context.
6. Quantum Mind and Participatory Universe: Kauffman proposes the hypothesis that quantum variables consciously measure and choose, suggesting that consciousness and will could be fundamental aspects of the universe. This challenges the idea that Turing Machines, based on classical physics, can make choices where the present could have been different.
Overall, Kauffman suggests that quantum physics may provide a framework for understanding consciousness, free will, and the participatory nature of the universe.