Talk:Bell's theorem

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EPR on lead

I think Nuretok has a point in the edit that XOR'easter reverted. The sentence is correct, but not helpful. But the more fundamental problem is that the lead is going into detail about a result that inspired Bell. Even if the detail was about Bell's theorem itself it wouldn't belong in the lead. Details about EPR are right out. To compound the issue the lead is already extremely long. Therefore I removed all mentions to EPR from there. It's already discussed in the History section, and that's where it belongs.

This also opens space for mentioning the variations of Bell's theorem that Ianjauslin wanted to include last year. I think that's much more relevant than historical background. Tercer (talk) 07:18, 10 June 2024 (UTC)[reply]

I'd been wanting to shorten the lede for a while now, so that seems like a good move. One could maybe make a case that EPR ought to be mentioned up top, but we definitely had too much on it, and I am content with leaving it out as is done presently. XOR'easter (talk) 16:11, 10 June 2024 (UTC)[reply]

While I agree that the intro was too long and we don't need all the history jammed in there, EPR->Bell's theorem is one of the most significant historical connections in QM. Per our general guidelines to summarize in the intro, a sentence related to EPR is due. Johnjbarton (talk) 16:42, 10 June 2024 (UTC)[reply]

I don't object to mention it, as opposed to explain it, but I'm not going to do it myself.

Encouraged by your comments I went a bit further in shortening the lead, eliminating what I think was just repetition. Tercer (talk) 17:20, 10 June 2024 (UTC)[reply]

“Not in doubt”

The intro states:

While the significance of Bell's theorem is not in doubt,

But in fact it is: https://www.degruyter.com/document/doi/10.1515/phys-2017-0088/html

The simulation results are parallel to those obtained in actual optical realizations of the basic Bell-test. The fact that this manifestly classical arrangement leads to a violation of a Bell Inequality must mean either that classical optics also is irreal or nonlocal; or that the significance of Bell’s analysis is misinterpreted, even invalid.
[…]
When this consideration for the most elementary optical version of experimental tests of Bell’s analysis is correctly taken into account, the derivation of a Bell Inequality does not go through. Thus, conclusions drawn from the empirical violation of a Bell Inequality are rendered invalid.

Does this perhaps deserve a mention somewhere? Spidermario (talk) 21:31, 30 September 2024 (UTC)[reply]