Recent content by analyst5

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    I Expanding universe and the Boltzmann brain problem

    This is what is obviously wrong, and not only in my opinion but in opinion of many who have studied the subject precisely. If there are infinite BBs in the future, normal brains would have no logical reason to believe their observations because each normal observation would be vastly...
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    I Expanding universe and the Boltzmann brain problem

    You're right, my bad. I agree that this disallows a reasonable discussion. I apologize. If you're okay with the fact that I would like to continue the discussion, I hope that you can write your opinion because I respect it despite occasional disagreements.
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    I Expanding universe and the Boltzmann brain problem

    Fair enough. Just tell me, why did you avoid commenting on any of the implications of your statements on my previous post?
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    I Expanding universe and the Boltzmann brain problem

    If a theory predicts that this stuff dominates, than it is almost certainly false. Only you think that there's nothing unusual being in a minority of non-Boltzmann brains so you base your conclusions based on a premise that is false and bizzare. On the other hand, if a theory predicts this...
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    I Expanding universe and the Boltzmann brain problem

    It's not a problem, according to mfb once we die, we will all be resurrected many, many times and our observable universe also. And we will spend time with unicorns and Obama's twin in thermodynamical equilibrium. Not bad for a physics expert and mentor which should brighten the mind and give...
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    I Expanding universe and the Boltzmann brain problem

    No, I'm completely agnostic to the possibility of its existence. You are extrapolating things without a doubt where there should be plenty of reasons for doubt, not including empirical evidence. I think nobody except you expects cube-shaped planets to exist, and that speaks enough about your...
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    I Expanding universe and the Boltzmann brain problem

    1) Each microstate is unlikely. 2) Cube-shaped planets are also unlikely. 3) Our choice of calling collection of atoms macroscopic is arbitary, so each state that we perceive and expect is also unlikely. 4) Therefore, we might expect cube-shaped planets, because we are in contact with...
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    I Expanding universe and the Boltzmann brain problem

    Give me one example of an unicorn anywhere in the universe. Which seems more realistic? I expect you to say something like "Atoms don't care!' No, but you completely eliminated the 2nd law of thermodynamics in conjucture with macroscopic behavior from your conclusions. I agree that the current...
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    I Expanding universe and the Boltzmann brain problem

    Give me one example of a macroscopic event with the same probability as quantum tunneling that happened in the history of our universe.This is fundamentally different than searching for planets orbiting galaxies. According to your logic, just because the keyboard I'm writing on has one of...
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    I Expanding universe and the Boltzmann brain problem

    Give me evidence that it's possible. Do unicorns exist if the universe is extremely large? As far as I know experimental physicists agree that it's impossible no matter what conditions are in questiom. There exists a borderline between theoretically possible and physically realizable. And we...
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    I Expanding universe and the Boltzmann brain problem

    Again, this is just a speculation and you avoided my question. Sure, it's mathematically possible but we don't know if it's physically realizable. Not all things that are mathematically possible are necessarily physically realizable in nature. The key is not that it's just one member of a much...
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    I Expanding universe and the Boltzmann brain problem

    I agree, thanks for the clarification PeterDonis. I was trying to make sense of what you said but I couldn't (not that I doubt that what you said makes absolutely perfect sense). What do you mean by antropomorphizing in this context and by considering every sequence of events as improbability...
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    I Expanding universe and the Boltzmann brain problem

    I understood your argument and I still disagree with you because you're clearly defending a somewhat subjective view of probability which doesn't have almost none resemblance in reality. Every result is unlikely if we are completely ignorant. I may say that the particular length of my hair is...
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    I Expanding universe and the Boltzmann brain problem

    See, this is what makes absolutely no sense. You are making conclusions based on an assumption that probability doesn't have a well-defined meaning of something objective that is happening out there. I believe that probability has nothing to do with humans and that it has a lot of physical...
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    I Expanding universe and the Boltzmann brain problem

    Yes, I do. But, as I mentioned before, I also doubt that structures emerging from high entropy states are in the same class as coin flipping, lottery etc. It is based on a number of controversial and unevidenced assumptions, like particle and energy conservation, binding energy for structures...
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