> until you look at What exactly does it mean? This sentence always feel like as if these particals are sentient beings and can react to when someone sees them

> until you look at What exactly does it mean? This sentence always feel like as if these particals are sentient beings and can react to when someone sees them. If observing means performing an experiment and finding out is this information, that an experiment to observe the actual state has been performed, sent to the other half? To know the state of other half another experiment had to be carried out on it. How is it any different from picking randomly from a set of pairs? We won't know what other half is until one of them is observed.