4 ms·

I never fully understood the Bell experiments. How exactly do they discount hidden variables?

• miltondts 9y ago
  They don't here is what Bell said: "There is a way to escape the inference of superluminal speeds and spooky action at a distance. But it involves absolute determinism in the universe, the complete absence of free will. Suppose the world is super-deterministic, with not just inanimate nature running on behind-the-scenes clockwork, but with our behavior, including our belief that we are free to choose to do one experiment rather than another, absolutely predetermined, including the ‘decision’ by the experimenter to carry out one set of measurements rather than another, the difficulty disappears. There is no need for a faster-than-light signal to tell particle A what measurement has been carried out on particle B, because the universe, including particle A, already ‘knows’ what that measurement, and its outcome, will be."
  • euyyn 9y ago
    Ok, and barred that?
    • BoiledCabbage 9y ago
      I could be mixing things here, but aren't the three options losing one of locality, definitiveness and non-conspiracy? https://en.wikipedia.org/wiki/Counterfactual_definiteness#Overview https://en.wikipedia.org/wiki/Counterfactual_definiteness#Ov...
• nazgul17 9y ago
  The way I understood it is in a YouTube video by Looking Glass Universe. I watched it time ago, but if I remember correctly, if there were hidden variables, the distribution of outcomes of his experiment would look different compared to what it actually looks. Sorry it's a half-assed explanation :)