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universe is "fine tuned" for life
http://web.mit.edu/rog/www/papers/fine_tuning.pdf
There is some evidence that the universe is "fine tuned" for life. If the fundamental constants of the universe were a little bit different then we couldn't exist. Roger White considers this evidence of a rational actor. Others see this argument being consistent with a multiverse hypothesis. Personally, I don't think fine tuning is convincing of either unless you are already predisposed to think that there might be a god or a multiverse.
I am unconvinced possible life supporting universe are sufficiently rare to need an explanation.
It may be true that adjusting any one of the fundamental constants will result in a universe which doesn't support life, but it doesn't necessarily follow that life supporting universes are rare.
Suppose that the gravitational constant, [itex]G[/itex] in [itex]F = \frac{GmM}{r^{2}}[/itex], is slightly stronger. This might create a universe which immediately collapses in on itself or a universe which only contains black holes. But suppose at the same time you adjusted the cosmological constant λ to prevent collapse and electromagnetism to allow "normal" matter to form ect. I believe thinking of the constants as settings on a dial might be fallacious, they are more like weights on a complex balance.
Furthermore the constants might not be a fundamental feature of the universe but an artifact of our limited understanding. Proposed theories of everything are generally trying to unify the disparate forces in the universe. Such a unified theory might show that constants can only have certain values. In our current understanding we don't know what if any range of values the constants might have. If the possible life supporting universes require a finite subset of values out of an infinite range then life supporting universes are rare indeed. But we simply don't have any particular reason to suppose that to be the case.
http://web.mit.edu/rog/www/papers/fine_tuning.pdf
There is some evidence that the universe is "fine tuned" for life. If the fundamental constants of the universe were a little bit different then we couldn't exist. Roger White considers this evidence of a rational actor. Others see this argument being consistent with a multiverse hypothesis. Personally, I don't think fine tuning is convincing of either unless you are already predisposed to think that there might be a god or a multiverse.
I am unconvinced possible life supporting universe are sufficiently rare to need an explanation.
It may be true that adjusting any one of the fundamental constants will result in a universe which doesn't support life, but it doesn't necessarily follow that life supporting universes are rare.
Suppose that the gravitational constant, [itex]G[/itex] in [itex]F = \frac{GmM}{r^{2}}[/itex], is slightly stronger. This might create a universe which immediately collapses in on itself or a universe which only contains black holes. But suppose at the same time you adjusted the cosmological constant λ to prevent collapse and electromagnetism to allow "normal" matter to form ect. I believe thinking of the constants as settings on a dial might be fallacious, they are more like weights on a complex balance.
Furthermore the constants might not be a fundamental feature of the universe but an artifact of our limited understanding. Proposed theories of everything are generally trying to unify the disparate forces in the universe. Such a unified theory might show that constants can only have certain values. In our current understanding we don't know what if any range of values the constants might have. If the possible life supporting universes require a finite subset of values out of an infinite range then life supporting universes are rare indeed. But we simply don't have any particular reason to suppose that to be the case.