Debunking Denialism

Defending science against the forces of irrationality.

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Summary of Victor Stenger’s Case against the Fine-tuning Argument

Victor Stenger is a physicist, philosopher and prolific author, and has recently published the book The Fallacy of Fine-tuning: Why the Universe is Not Designed for Us. It contains perhaps the best currently existing response to the creationist argument from fine-tuning from the perspective of physics. Now, other philosophical and mathematical responses exists, but this is a comprehensive overview of the scientific case against the fine-tuning argument. I will summarize some of the more interesting parts of Stenger’s case below by paraphrasing certain parts of the last part of the final chapter in the book (pp. 293-294) as well as mentioning other problems mentioned in other parts of the book.

1. Many proponents of the fine-tuning argument quote Stephen Hawking out of context to try and show that Hawking thinks that the expansion rate of the universe is fine-tuned. In reality, Hawking just lists this problem as a problem for the big bang theory before cosmological inflation is taken into account. When it is, the fine-tuning problem of the expansion rate goes away.

2. Many proponents of the fine-tuning argument appeal to the singularity theorem proved by Hawking and Penrose in order to try and established that the universe began in a singularity. However, a singularity would be very massive and have infinitesimal volume. This is forbidden in quantum mechanics due to Heisenberg’s uncertainty principle, which states (in one of its versions) that the uncertainty in momentum times the uncertainty in position cannot be less than a specific non-zero number. Thus, the theorem proved by Hawking and Penrose is not applicable anymore.

3. Claims about fine-tuning are made against the backdrop of our particular form of life, yet other forms of life may be possible. Read more of this post

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