On 18 Aug 2017, at 21:05, John Clark wrote:

On Fri, Aug 18, 2017 at 1:27 PM, Bruno Marchal <marc...@ulb.ac.be> wrote:

 ​>> ​I tire of your homemade baby talk. ​

​> ​Insult = lack of argument.

1-you​ = Homemade Baby Talk.​

1-you refer to your subjective, first person, experience. It remains, throughout the whole experience, an experience of being one person, entire, seeing only one city. "the observer does not feel the split".


But I know you love homemade acronyms too so perhaps you prefer HBT.

Ad hominem.



​​>> ​All that is real nice but let me repeat the question that I have asked 999 times and you have dodged 999 time: What one and only one city will I see tomorrow?

​> ​Washington or Moscow, each with a probability of 1/2.

That's the same thing you said BEFORE the duplication,

Indeed. I do the prediction lways before the experience. if not, it is not a prediction.




now that the duplication Is long over is that STILL the best you can say even now?


No, after the duplication, there is no more prediction. Only verification if my bet was correct or not. You can look at the detailed answer in previous post, for example the one by Quentin.





Regarding a coin, if the best we could say is "after the coin fell and everybody observed how it landed it turned ​out ​it fell heads or tails with a probability of 1/2"​ ​ then the very concept of probability would be utterly meaningless.

That is my point.



But we can do better than that, much better, we can say "it turned out that after the coin was flipped in landed heads with 100% certainty" with no need to add and any ifs ands or buts​ ​ whatsoever. That's because "how will the coin land after it is flipped?" is a real question with a real answer, but "what one city and only one city will I see after I am no longer one but have become two?" is not a question and thus ​it ​obviously has no answer​, not today not tomorrow not ever. ​

You just rephrase the question in a strange way, but it is obvious that when we assume mechanism, the question makes perfect sense. You know with certainty (given what we have accepted) that after pushing on the button, you (whoever you can possibly feel to be) will see only one city, and this without knowing which one in Helsinki.

Bruno






John K Clark









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