The EPR paradox (Einstein-Podolsky-Rosen paradox) is a set of experiments that suggest ‘spooky action at a distance’ because particles appear to share information instantaneously, at a distance, long after an interaction between them.
People applying “common sense” would like to argue that there is some way that the information is being shared—some hidden variable that collects and shares the information between them.
Bell’s Inequality only assumes there there is some such hidden variable operating locally* -- with no specifications of any kind on how it works—and deduces correlations between particles sharing information that is in contradiction with experiments.
* that is, mechanically rather than ‘magically’ at a distance
The EPR paradox (Einstein-Podolsky-Rosen paradox) is a set of experiments that suggest ‘spooky action at a distance’ because particles appear to share information instantaneously, at a distance, long after an interaction between them.
People applying “common sense” would like to argue that there is some way that the information is being shared—some hidden variable that collects and shares the information between them.
Bell’s Inequality only assumes there there is some such hidden variable operating locally* -- with no specifications of any kind on how it works—and deduces correlations between particles sharing information that is in contradiction with experiments.
* that is, mechanically rather than ‘magically’ at a distance