Continuing the discussion from The Pilot Wave Interpretation of Quantum Mechanics:

As a supplement to a sister thread, some people are probably wondering what we mean by “Bell’s Inequality”. The wikipedia page is dense:

This article from Mark Alford at WUSTL might be a better start. He presented a talk on this to the seminary faculty at Concordia (@CPArand), and they were able to follow him.

Ghostly action at a distance: a non-technical explanation of the Bell inequalityWe give a simple non-mathematical explanation of Bell’s inequality. Using the inequality, we show how the results of Einstein-Podolsky-Rosen (EPR) experiments violate the principle of strong locality, also known as local causality. This indicates, given some reasonable-sounding assumptions, that some sort of faster-than-light influence is present in nature. We discuss the implications, emphasizing the relationship between EPR and the Principle of Relativity, the distinction between causal influences and signals, and the tension between EPR and determinism.

[1506.02179] Ghostly action at a distance: a non-technical explanation of the Bell inequality

We have physicists on the forum, so ask your questions if you’d like to understand.