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What are M-Theory and String theory etc. and are they valid scientific theories?

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Author Topic:   What are M-Theory and String theory etc. and are they valid scientific theories?
Modulous
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Posts: 7801
From: Manchester, UK
Joined: 05-01-2005

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Message 32 of 48 (400873)
05-17-2007 4:39 AM 		Reply to: Message 31 by Percy
05-16-2007 7:29 PM

Re: rejuvenating the topic
Probably the strongest criticism of string theory is that it doesn't make any testable predictions.
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The strongest criticism in my view is that there are several string theories. Many of its tests aren't unique to string theory. M-theory is a way of unifying the different string theories.
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In order that the unique predictions it makes to be tested we need some sort of Large Hadron Collider.
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