discussion

The unusable-argument

Defenders of relativity often use the following argument: The violation of Bell's inequality cannot be used to tranfer information. Thus, this is not in contradiction with relativity.

But it is easy to explain why we cannot use this device for information transfer. Indeed, there are two explanations – one based on information transfer from A to B, the other on information transfer from B to A. But an effect which can be explained by information tranfer from B to A cannot be used to transfer information in the other direction, from A to B – a quite obvious fact. And the same obvious fact works in the other direction too: An effect which can be explained by information tranfer from A to B cannot be used to transfer information from B to A. Thus, the simple fact that the effect allows two different explanations – by information transfer from A to B, as well as by information transfer from B to A – has the consequence that it cannot be used for information transfer in any of the two directions. Something which can be used to transfer information from A to B cannot be explained with information transfer from B to A.

This can be reformulated in the following way: We have two possible explanations for violations of Bell's inequality. For each of the two explanations, the question is reasonable why we cannot use it for information transfer. The answer is, in above cases, the reference to the other explanation. Thus, we have realistic explanations for the violation of Bell's inequality, and as well, for the fact that we cannot use it for information transfer. But above explanations require the violation of Einstein causality. Thus, all realistic explanations require the violation of Einstein causality.

Moreover, that we cannot use the violation of Bell's inequality to build an FTL phone line does not mean that we cannot use this effect to coordinate the behaviour of a team over long distances in a way which requires superluminal information transfer. An example of such an application is our game. One team can win in the game using violations of Bell's inequality, but, on the other hand, we can prove that the game is fair if this team cannot use any information transfer. There is no contradiction – the team simply uses the hidden information transfer, which is necessary to violate Bell's inequality, and the proof uses the same assumptions as the proof of Bell's inequality.

That means, the violation of Bell's inequality has practical applications, and these applications make use of the hidden superluminal information transfer, they would be impossible without it.