August 18, 2025

Episode 302: A Philosopher and a Physicist Discuss Probability and the Fine Tuning of the Universe with Dr. Timothy McGrew and Dr. Luke Barnes

1 hour 7 minutes

How does philosophy inform modern physics? And how do physicists incorporate philosophy into their research?

On this episode, we dive into those questions with philosopher Dr. Timothy McGrew and astrophysicist Dr. Luke Barnes in order to help you fine tune your thinking about the fine tuning of the universe.

Critics of the fine-tuning argument will often invoke probabilities in order to get around the argument's deeper implication of the existence of God.

Tim and Luke will explore some of the issues in probability theory as it informs the physics of the fine-tuning argument.

Dr. Timothy McGrew

Timothy McGrew is Professor of Philosophy at Western Michigan University, where he has taught for the past 25 years. His research interests include formal epistemology, the history and philosophy of science, and the history and philosophy of religion. When he is not doing philosophy, he enjoys playing chess online, coaching at his local chess club, running trails, and making high quality paper airplanes. He lives in SW Michigan with his wife, Lydia McGrew, and their daughters.

Dr. Luke Barnes

Dr Luke A. Barnes is a Senior Lecturer in Physics at Western Sydney University. With a PhD in astronomy from the University of Cambridge, he has published papers in the field of galaxy formation and on the fine-tuning of the Universe for life. He is the coauthor with Prof. Geraint Lewis of A Fortunate Universe: Life in a Finely-Tuned Cosmos and The Cosmic Revolutionary's Handbook: (Or: How to Beat the Big Bang), published by Cambridge University Press.

Free Articles from Watchman Fellowship

Profile on Naturalism: https://www.watchman.org/Naturalism/ProfileNaturalism.pdf

Profile on Scientism: https://www.watchman.org/scientism/ProfileScientism.pdf

Profile on Atheism: https://www.watchman.org/profiles/pdf/atheismprofile.pdf

Additional Resources

FREE: We are also offering a subscription to our 4-page bimonthly Profiles here: www.watchman.org/Free
PROFILE NOTEBOOK: Order the complete collection of Watchman Fellowship Profiles (around 700 pages -- from Astrology to Zen Buddhism) in either printed or PDF formats here: www.watchman.org/Notebook
SUPPORT: Help us create more content like this. Make a tax-deductible donation here: www.watchman.org/Give
Apologetics Profile is a podcast ministry of Watchman Fellowship For more information, visit www.watchman.org © 2025 Watchman Fellowship, Inc.