PeterDonis said:
The ones you explicitly stated, to which I responded in post #166. Are you reading what anyone else writes in this thread?
(Small note but for clarification the intuitions weren't ones I had brought into the conversation, they were introduced by PeterDonis in post #154)
A slightly strange reply, since I offered a quote from you and asked you whether they were the intuitions you were talking about, to which you replied:
PeterDonis said:
They are. See above. I've already responded to what you say after this. Again, are you reading what others write in this thread? You keep on repeating statements of yours that others have already addressed.
I don't think it takes a detective to work out that I had obviously read them to quote them. You seem to be reverting to a tactic you have used before, in claiming that what I am asking has already been answered, and that I am not reading the replies, then shutting down the thread.
In post #166 you simply repeated your claim that the intuitions were incompatible
PeterDonis said:
You're still not getting it. These two intuitions, in themselves, are not compatible.
While again failing to point out why Everett's interpretation is not compatible with them.
With Everett's interpretation (as I understand it) the intuition that spacelike separated events can't causally affect each other is satisfied because there is no faster than light influence. But each measurement leads to a "split in the universe". In one half of the split the measurement measured a +1/2 spin and in the other it measured a -1/2 spin, and that is the case for each particle irrespective of what the other measurement was. So the first measurement does not influence the second, thus the spacelike separated events don't causally affect each other. So it is compatible with the first of your so called incompatible intuitions.
But what about the second? Those splits then propagate at the speed of light through the universe, and when they meet, both sides of the splits which carried the +1/2 spins measurements marry up with the sides of the splits that carry the -1/2 spin from the other measurement. So it offers a causal explanation for the violation of the Bell inequalities.
So perhaps either explain where I am wrong with Everett's interpretation being compatible with the intuitions you claim are incompatible, or concede that you were wrong that they were incompatible, and had just ignored what I had wrote when I repeatedly pointed out Everett's interpretation.
PeterDonis said:
Which measurement led to the collapse is not an observable, and has no physical meaning. Yes, it could be considered "relative", but that just means you should quit trying to think about it and focus on invariants instead.
To you. To you it has no physical meaning, because you have adopted a logical positivist like attitude to the issue. You didn't point it out though when you initially claimed that there could be no spacelike separated causal relations. You effectively deny causality. You deny that you do, but that is because you redefine the term causality to mean something different. You do deny causality as it is commonly conceived. In which there is a relation between a cause an effect. But not everyone takes a logical positivist type attitude. And without redefining causality, and instead using the common usage, with the Copenhagen Interpretation spacelike events can be causally related. So how do you feel you were correct in claiming that it isn't debatable that they can be given the Copenhagen Interpretation which I thought was a quite commonly held interpretation of quantum mechanics, and the one I assume you were taught at university?