Quantum mechanics (from Loudon):
Hypothetical bunching model:
Photons are localized with a diffuse external field and a single frequency. By themselves they do not have sufficient energy to cause a detection event, but the superposition of fields of many photons leads to intensities sufficient to cause a detection event. Detections are caused by the superposed fields of photons.
It is thereby assumed that realism can be defined by a mathematical analysis of experiments. Don't you think that this is presumptuous? It seems more likely that realism is more fundamental than quantum mechanics. The problem with quantum mechanics is that it only accepts challenges to its interpretations that abide by its rules. In the Nature article there are two objections to violations of the Bell inequality: that there is a subliminal communication and that not all detections were recorded. It does not suggest what to me is the real cause, that the detection event is incorrectly interpreted. Bell's inequality is a commentary on the nature of detection events, not locality or photons. Clearly we cannot look behind the phenomena to determine the truth, but as long as that possibility exists local realism has not been disproved.
Quantum mechanics should be able to say what part of reality cannot be observed, IOW precisely define its own limitations.
The trouble with trying to prove quantum mechanics wrong is that they insist that you come up with better predictions. All one has to do is prove that the predictions are based on a superficial understanding of nature or photons or whatever. If Bell was using an incorrect model then he is proving something about quantum mechanics, not reality.