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Yes, depending on your favorite definition of "different model" there are models that can not be distinguished even in principle. Most famous example is the dif
by yk 8y ago
Yes, depending on your favorite definition of "different model" there are models that can not be distinguished even in principle. Most famous example is the different interpretations of quantum mechanics.
In my opinion the reasonable way to deal with that, is to assume that they are the same model since they describe the same physics and leave the semantics to the philosophers.
- mirimir 8y agoYeah, I was thinking along similar lines, but it seemed too outrageous. The various interpretations of QM are so-far indistinguishable because they're based on the same (or equivalent) mathematics, and so make the same predictions. This one, though. I mean, the fundamental observation is that red shift increases with distance. The accepted model has red shift caused by motion away from us, and so we conclude that recessional velocity increases with distance. That is, the Universe is expanding. This new model has blue shift caused by increasing mass. And so we are blue-shifted relative to distant stuff, which we see only in the past. So it looks red-shifted to us. And distance is proportional to time delay, so stuff that's farther away is more red-shifted. Bu I don't see how the temporal rate of mass increase could be related to -- or rather, another reflection of -- the expansion of the Universe. But then, IANAP, so hey.