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anEvilAtheist
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By the way, sorry for being so behind on responding to posts. I wanted to take my time responding to your earlier post because I think the fine-tuning argument does not deserve to be casually dismissed. When laid out in the way you did, the fine-tuning argument seems very compelling. However, this is not the first time I have heard the argument and after considering the evidence on both sides, I concluded that this is not good evidence that there is a God. I will try to identify some, though by no means all, of the problems I see with the fine-tuning theory. Let me know if you see any major flaws in my reasoning.
The problem here is that we have no other universes to look at so we cannot determine how unlikely this really is. Just think for a second, how would you randomly choose a number from zero to infinity? You can’t as long as all numbers are equally likely. So you need to have some distribution where some numbers are more common than others. But since we have only one data point (our universe), we are not able to say exactly how likely each value of a given constant is. If we had a probability density function for the possible values of one of the constants, then we could say whether or not our value of that constant in our universe is unusual. But without knowing what that distribution is, the probability of a given constant being within .0000000000001% of our universe’s value could be 99%. If this were the case, then finding out that a .0001% change in the constant would result in a universe devoid of life would be irrelevant. To be impressed, we would first need to know the range of possible values for these constants.Dr. Dennis Scania, head of Cambridge University Observatories, said in a BBC science documentary, "The Anthropic Principle: “If you change a little bit the laws of nature, or you change a little bit the constants of nature - like the charge on the electron - then the way the universe develops is so changed, it is very likely that intelligent life would not have been able to develop.”
In The Unconscious Quantum: Metaphysics in Modern Physics and Cosmology, physicist Victor Stenger showed that even if you randomly select the values of the key physical constants from five orders of magnitude below our universe’s values to five orders above, the large majority of such universes would have stars that lasted long enough for life to form and evolution to take place. Although I respect the opinion of a mathematician, I could see how a mathematician might not understand how the various constants interact (they are not all independent of each other) as well as a physicist like Stenger would.Dr. David D. Deutsch, Institute of Mathematics, Oxford University: observed: “If we nudge one of these constants just a few percent in one direction, stars burn out within a million years of their formation, and there is no time for evolution. If we nudge it a few percent in the other direction, then no elements heavier than helium form. No carbon, no life. Not even any chemistry. No complexity at all.”
So what? As I mentioned in the first part of this post, this is not evidence that our universe is unlikely without the existence of a God.Dr. Paul Davies, noted author and professor of theoretical physics at Adelaide University, said: “The really amazing thing is not that life on Earth is balanced on a knife-edge, but that the entire universe is balanced on a knife-edge, and would be total chaos if any of the natural ‘constants’ were off even slightly.”
I am perfectly willing to grant that there are some physicists who are impressed by the fine-tuning argument. Physicists disagree on this issue (though I do not think that Hoyle’s position is a very common opinion), reflecting the high level of uncertainty we have over just how likely values similar to our universe’s are. So while I wouldn’t claim this is a settled issue, there is currently not enough evidence to conclude that a universe containing life would be fantastically improbable. And physicists make mistakes, for example Fred Hoyle rejected the big bang model and was a big proponent of the steady state model.When the late Sir Fred Hoyle was researching how carbon came to be created in the “blast-furnaces” of the stars, his calculations indicated that it is very difficult to explain how the stars generated the necessary quantity of carbon upon which life on earth depends. Hoyle found that there were numerous “fortunate” one-time occurrences which seemed to indicate that purposeful “adjustments” had been made in the laws of physics and chemistry in order to produce the necessary carbon.
Hoyle summed up his findings as follows: “A common sense interpretation of the facts suggests that a superintendent has monkeyed with the physics, as well as chemistry and biology, and that there are no blind forces worth speaking about in nature. I do not believe that any physicist who examined the evidence could fail to draw the inference that the laws of nuclear physics have been deliberately designed with regard to the consequences they produce within stars.”