Post Number:#46 May 25th, 2012, 9:00 am
Xris wrote:Half-Six wrote:Xris wrote:Half-Six wrote:Xris wrote:If you accept Bells theorem not only do you have to reject hidden variables you have to accept particles can travel faster than light or even instantaneously.
This isn't true. If you accept Bell's theorem you have to reject local hidden variables. You don't have to reject hidden variables, as long as they're non-local, and you don't have to reject locality, as long as you reject hidden variables. You have to reject one or the other, but not necessarily both.
Well you had better tell others that. So the decay of radioactive atoms could be determined if we knew the hidden variable?
The decay of radioactive atoms cannot be explained using a "local hidden variable" explanation, if we accept Bell's theorem. It might be possible using a hidden variable explanation that's non-local (e.g. perhaps David Bohm's).
So do we actualy state that the decay of radioactive atoms are random?
No, they follow a pattern, otherwise we couldn't talk of a half-life, which is not random, it's quite particular, even though statistical. And we can observe the pattern, the clicks of a Geiger counter e.g. It’s a fact. What Bell's theorem shows, if we accept it is that underlying local hidden-variables cannot account for the pattern. The question then, is how do we account for them? There are various possibilities, such as non-local hidden-variables (Bohm), or locality without hidden-variables (Many-worlds). I think in some ways I agree with you in that all these “underlyings” are nonsensical; either we use them as imaginative inspiration to derive new experiments to make whatever is underlying – overt; and perhaps thus discover something not described by QM (which to my mind is doing science). Or we discard the “underlyings”, stick with what we have – the strong correlations of Bell’s theorem – and think again why we have what we have (which to my mind is doing philosophy). Whatever we choose though, we have to understand Bell and QM don’t deny both locality and hidden-variables.