On Humans Epilogue: Is the Brain Free to Choose? ~ Tim Coulson
Nov 5, 2025
Tim Coulson, an Oxford biologist and author, dives into the complexities of free will, linking it to the evolution of movement and the origins of behavior. He debates whether the universe is deterministic or random, highlighting quantum mechanics as a potential source of true randomness. Coulson explores intriguing concepts in quantum biology, like its role in photosynthesis and consciousness. He passionately argues how randomness influences our choices, while sharing his humanist outlook, emphasizing the unique privilege of scientific exploration.
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Determinism Versus Quantum Randomness
- Physics offers two broad views: strict determinism or inherent randomness at tiny scales.
- Tim Coulson argues quantum-level stochasticity is the only known source of true randomness in the universe.
Quantum Effects Can Influence Biology
- Quantum behavior is the plausible origin of randomness that could scale into biological systems.
- Coulson notes quantum effects (e.g., photosynthesis) already influence some biological processes.
Many-Worlds Is An Untestable Alternative
- Interpretations of quantum mechanics differ: many-worlds keeps determinism by branching universes.
- Coulson calls many-worlds untestable currently and treats it as speculative compared with true stochasticity.
