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This is violating conservation of momentum, not conservation of energy. You cannot build a perpetual motion machine using it. But even if you could, that is not
by kobeya 10y ago
This is violating conservation of momentum, not conservation of energy. You cannot build a perpetual motion machine using it. But even if you could, that is not a reasonable argument. Reality is what it is.
- ncallaway 10y ago"But even if you could, that is not a reasonable argument" It may not be a reasonable argument to claim that it is impossible, but it is a totally fine argument to make that it is insanely unlikely and needs a mountain of evidence before we take the conclusions seriously.
- kobeya 10y agoThat's an argument about priors. In the face of actual evidence of its reality, priors establish significance not believability.
- inimino 10y agoNo... priors are precisely about believability. Any evidence can be explained either by the effect or by experimental error. Your prior is how relatively likely these two possibilities are. If something is "significant" then it is surprising and requires stronger evidence.