The fine-tuning of the cosmos is a
scientific fact which is not up for debate.
Premise I: The universe has several physical constraints. Scientific fact.
Premise II: These physical constraints have very precise properties which allow our universe, and human life, to exist. Scientific fact.
Conclusion: The universe is fine-tuned. Scientific fact.
I repeat: The fine-tuning of the cosmos is a
scientific fact which is not up for debate. If you disagree with this statement, you are denying settled science, and should be banned from this forum, and all other science-based forums (both online and off).
Where the debate actually lies (pun intended) is with the question
what is the cause of the fine-tuning? This is where the science is not settled, as there are currently two valid competing hypotheses:
Atheist Hypothesis: Multiverse. With so many universes (perhaps an infinite number), each with random properties, it was inevitable that (at least) one would end up with the properties of our current universe. Yes, our universe is fine-tuned, but it's a matter of overwhelming numbers putting luck in our favor, not of design.
Theist Hypothesis: God. Designs are the result of the intentional manipulation of the universe to achieve a desired goal. For example, I'm intentionally manipulating the pixels on your screen with the desired goal of sharing my thoughts. This is the hallmark of intelligent design; it's what we would expect to discover if the universe were designed for a purpose. Guess what? It's exactly what science has discovered.
Now, which of these two hypotheses is the most compelling is entirely subjective. I find the God hypothesis to be the far more rational view, and I believe the multiverse to be a highly-contrived, unscientific dodging of an unwanted conclusion (God).
I fully accept that I could be wrong, and the multiverse is true. However, even if the multiverse is true, it would only explain the
how of the fine-tuning of our universe; fine-tuning would still be a
scientific fact.
More here:
Dear Anthropic Principle Deniers: How the Laws of Physics Prove Fine Tuning