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|    sci.physics    |    Physical laws, properties, etc.    |    178,769 messages    |
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|    Message 178,397 of 178,769    |
|    Mild Shock to All    |
|    Busy Beaver and Theory Consistency (Was:    |
|    02 Dec 25 17:43:49    |
      XPost: sci.physics.relativity, comp.lang.prolog       From: janburse@fastmail.fm              Hi,              If you know BB(N), you have a halting decision procedure       for N-turing machines. Since if BB(N) is maximum number       S(N) of steps before halting,              you can just run an arbitrary turing machine, and when       its steps exceeds S(N), you know its not a halting       turing machine.              So knowing BB(N) makes the halting problem decidable.       But the halting problem is not decidable. So there       must be some M maybe where BB(M) has no S(N) , no              maximum. Idea is to construct turing machines that       relate to consistency problems, consistency problems       can be even harder than halting problems, we might              ask for the opposite, does a program never halt.       Since never halt could be interpreted that no       inconsistency is derived. Again knowing BB(N) would              help, since dedidability via S(N) is established both       ways, saying "Yes" to halt, and saying "No" to not halt.       So we can show a reducibility from consistency              to busy beaver, I guess.              Bye              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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