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Author Topic:   Creationists think Evolutionists think like Creationists.
Bikerman
Member (Idle past 3032 days)
Posts: 276
From: Frodsham, Chester
Joined: 07-30-2010


Message 481 of 485 (573110)
08-09-2010 8:55 PM
Reply to: Message 480 by Taq
08-09-2010 4:11 PM


Re: That's a Big Jump
The extra dimensions posited by m-theory are curled-up into something known as a Calabi-Yau manifold which exists at every point in spacetime (notice that we are straight away assuming that the GR model of 'smooth' spacetime is wrong - something which we are pretty sure of - it almost certainly must quantise).
It isn't metaphysics for the simple reason that it is testable - we just haven't had either the mathematics to make detailed predictions or the kit to poke away at the problem and give the theoreticians something to work with.
One prediction would be that gravity will not obey the inverse-square law at the smallest scales. As you get down to the Planck length then gravity is going to change. One possible outcome is the much talked-about formation of Micro-black holes. QED tells us that no such thing is possible if we use GMm/r^2 for the calculations. If MBH are observed at LHC then it would be strong circumstantial evidence for multiple dimensions.

More reading http://www.slac.stanford.edu/...f/C9808031/pdf/ssi98-008.pdf


This message is a reply to:
 Message 480 by Taq, posted 08-09-2010 4:11 PM Taq has not yet responded

    
GDR
Member
Posts: 4782
From: Sidney, BC, Canada
Joined: 05-22-2005
Member Rating: 1.5


Message 482 of 485 (573119)
08-09-2010 10:30 PM


There you go Taq. Bikerman beat me to it. That's exactly what I was going to say.
Replies to this message:
 Message 483 by Percy, posted 08-10-2010 4:52 AM GDR has responded

    
Percy
Member
Posts: 18309
From: New Hampshire
Joined: 12-23-2000
Member Rating: 2.7


Message 483 of 485 (573145)
08-10-2010 4:52 AM
Reply to: Message 482 by GDR
08-09-2010 10:30 PM


GDR writes:

There you go Taq. Bikerman beat me to it. That's exactly what I was going to say.

In Message 479 you argued that string theory proposes dimensions that are imperceivable and therefore metaphysical. Bikerman argues the opposite ("It isn't metaphysics for the simple reason that it is testable...One prediction would be that gravity will not obey the inverse-square law at the smallest scales.").

Were you really going to argue against yourself? Or did you maybe not understood that Bikerman was pointing out that the extra dimensions of string theory are believed to be perceivable?

--Percy


This message is a reply to:
 Message 482 by GDR, posted 08-09-2010 10:30 PM GDR has responded

Replies to this message:
 Message 484 by GDR, posted 08-10-2010 10:19 AM Percy has responded

    
GDR
Member
Posts: 4782
From: Sidney, BC, Canada
Joined: 05-22-2005
Member Rating: 1.5


Message 484 of 485 (573185)
08-10-2010 10:19 AM
Reply to: Message 483 by Percy
08-10-2010 4:52 AM


In that message I asked the question this way:
quote:
I don't imagine that string theory advocates dimensions that we can perceive so wouldn't that make them metaphysical?

Bikerman effectively answered my question, the answer being that no it doesn't.


This message is a reply to:
 Message 483 by Percy, posted 08-10-2010 4:52 AM Percy has responded

Replies to this message:
 Message 485 by Percy, posted 08-10-2010 11:27 AM GDR has not yet responded

    
Percy
Member
Posts: 18309
From: New Hampshire
Joined: 12-23-2000
Member Rating: 2.7


Message 485 of 485 (573202)
08-10-2010 11:27 AM
Reply to: Message 484 by GDR
08-10-2010 10:19 AM


Sorry, missed the sarcasm.

--Percy


This message is a reply to:
 Message 484 by GDR, posted 08-10-2010 10:19 AM GDR has not yet responded

    
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