Moontanman Posted May 22, 2013 Share Posted May 22, 2013 You might be right to say that we have no evidence of an infinite universe. But there is some evidence for multiple universes, even if inflation isn't necessarily eternal. Note: I begin using the term "god-tuned" because fine-tuning isn't always explained theologically, as with the anthropic approach. The god-tuned concept or the designer concept lacks evidence, whereas the multiverse theory has some evidence. To the gnostic readers: I say there is no evidence for a designer because I think of evidence as fulfilled predictions. The designer concept has no fulfilled predictions, it just rests on an arguments for its necessity (not just its necessity for fine-tuning, but also for biological adaptions and even the genesis of life). The problem with arguments for necessity is that they're difficult to uphold. To uphold one, you have to show that there is no possible alternative. Since the "neccessary" concept lacks evidence, the alternatives don't need evidence either. An alternative could be just about any whacky explanation my creative mind can crap out. Note: The term "argument for necessity" is something I just made up. It's not formal. Alright, maybe our universe isn't fine-tuned. From your link: Some of my physicist colleagues find the multiverse theory alarming. Any theory in physics stands or falls depending on whether its predictions agree with the data. But how can we verify the existence of other bubble universes? Paul Steinhardt and George Ellis have argued, for example, that the multiverse theory is unscientific, because it cannot be tested, even in principle. Surprisingly, observational tests of the multiverse picture may in fact be possible. Anthony Aguirre, Matt Johnson, Matt Kleban and others have pointed out that a collision of our expanding bubble with another bubble in the multiverse would produce an imprint in the cosmic background radiation—a round spot of higher or lower radiation intensity. A detection of such a spot with the predicted intensity profile would provide direct evidence for the existence of other bubble universes. The search is now on, but unfortunately there is no guarantee that a bubble collision has occurred within our cosmic horizon. It is an interesting idea a very interesting idea but my personal favorite is the Ekpyrotic Universe it explains quite a bit about what happened before and how our universe came to be. Link to comment Share on other sites More sharing options...
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