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JET
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   Posted 11/29/2009 11:55 AM (GMT -6)    Quote This PostAlert An Admin About This Post.
Anybody see this?

From the December 2009 Scientific American Magazine:

www.scientificamerican.com/article.cfm?id=splitting-time-from-space

The article said...
Hořava’s theory has been generating excitement since he proposed it in January, and physicists met to discuss it at a meeting in November at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario. In particular, physicists have been checking if the model correctly describes the universe we see today. General relativity scored a knockout blow when Einstein predicted the motion of Mercury with greater accuracy than Newton’s theory of gravity could.

Can Hořřava gravity claim the same success? The first tentative answers coming in say “yes.”


I thought about posting this in the Raging Debate section, but I don't understand this enough to know how relevant this might or might not be w/r/t open theism.

Post Edited (JET) : 11/29/2009 10:58:20 AM (GMT-6)

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Similitude
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   Posted 11/29/2009 12:09 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
From the article: The snag is that in quantum mechanics, time retains its Newtonian aloofness, providing the stage against which matter dances but never being affected by its presence. These two conceptions of time don’t gel.

Jeff: IOW, science is tentative and can never prove or disprove our categories of space, time and causality. That can't be done and still retain non-relativistic epistemology. Now, if we want to embrace epistemological relativism, it truly is a free-for-all. Science, in that case, proves nothing.


 

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Similitude
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   Posted 11/29/2009 12:57 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
Einsteinian relativity has always been inconsistent with QT. A few years ago relativists and quantum theorists got together to try to theoretically resolve the inconsistency. After a while, they realized they weren't even defining space in the same way, just as this article admits. It seems that QT and Einsteinian relativity were even more inconsistent than they realized at the time. Unless we're willing to dump the LNC, there is no way both Einsteinian relativity and QT can be true as currently conceived. Indeed, there is no way to disprove Lorentzian relativity in the first place. Some theorists have conceived of possibilities where Lorentzian relativity is consistent with all the classical conceptions of physics, involving no counter-categorical ideas. They can't be proved or disproved anymore than Einsteinian relativity or QT can, because the difference is in the metaphysics.

What physicists do is come up with math equations that can allow us to predict phenomena. They then try to imagine what kind of real properties the non-temporal/non-spatial variables/constants in the equations correspond to. But there's no way to know one is right on that interpretive piece. For all we know, all fundamental physical particles are animated by their own spirits which act in a law-like fashion. Such interpretations are just untestable hypotheses. IOW, that interpretive piece of the theory is a form of metaphysical speculation. And as this article shows, different theorists can generate different interpretations that are consistent with the basic mathematical predictive approach. For example, there is no way to prove that space rather than ultra small particles functioning according to Lorentzian relativity is the real explanation of the relativistic math. Math is one thing. Metaphysical interpretations of mathematical equations is something else altogether.

When scientists tell you that the best explanation is that which is the consensus opinion, just remember they're doing metaphysics just like those philosophers whose work they think is so futile. The real value of physics is the ability to predict phenomena whether or not any particular metaphysical explanation of that predictability is correct. Scientists ASSUME, e.g., that all animal behavior is explicable in terms of matter. They have no more demonstrated it than a man in the moon. Scientists are metaphysicians just like the rest of us, however much they confusedly deny it.


 

Post Edited (Similtude) : 11/29/2009 12:18:34 PM (GMT-6)

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Tom
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   Posted 11/29/2009 1:20 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
So this is good I take it? ;o)

Looks like he's lining up with Lorentz basically. No?

T


"Man is a person not by nature but by spirit. By nature he is only an individual." Nicolas Berdyaev

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Similitude
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   Posted 11/29/2009 1:35 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
From what little I read, he doesn't seem to be embracing Lorentzian relativity. Which just shows how many things people can conjure up when they're waxing metaphysical. But it's precisely because of this ability to do so, that I don't give up on what seems to me to be categories. Categories seem to me to be the God-given grounds of intelligible thought. Without them, I couldn't even see the rationality of open theism. Zach is right that my view of categories may be wrong. But until someone shows me the error of my views, they're all I have to work with. Thus, I don't worry about contemporary claims that my views are wrong when their alternative is to suppose that foundationalism is false (which is what mainstream science does). As I understand reason, foundationalism is unavoidable. And if we really must choose our categories and criteria of plausibility, then epistemological relativism is simply the case. And if that's the case, God can't possibly expect us to be of "one mind" in any conceivable sense. For where nothing is given, nothing is required.


 

Post Edited (Similtude) : 11/29/2009 1:23:55 PM (GMT-6)

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Similitude
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   Posted 11/29/2009 2:38 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
The reason it doesn't seem like Lorentzian relativity is because he talks about space/time splitting into space AND time. Lorentzian relativity doesn't do that, as I understand it. Lorentzian relativity was posited to account for a way that Newtonian space could be the accurate account.


 

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Tom
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   Posted 11/29/2009 2:59 PM (GMT -6)    Quote This PostAlert An Admin About This Post.
Ah. I was just thinking of how Lorentz didn't dismiss absolute simultaneity (i.e., didn't spatilize time like Einstein).

T


"Man is a person not by nature but by spirit. By nature he is only an individual." Nicolas Berdyaev

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