Re: Defining a correct halting decidability decider

On 8/8/24 9:21 AM, olcott wrote:

On 8/8/2024 2:12 AM, Mikko wrote:

On 2024-08-07 13:12:43 +0000, olcott said:
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On 8/7/2024 1:59 AM, Mikko wrote:

On 2024-08-04 19:33:36 +0000, olcott said:
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On 8/4/2024 2:05 PM, Richard Damon wrote:

On 8/4/24 2:49 PM, olcott wrote:

On 8/4/2024 1:38 PM, Richard Damon wrote:

On 8/4/24 10:46 AM, olcott wrote:

When we define an input that does the opposite of whatever
value that its halt decider reports there is a way for the
halt decider to report correctly.
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int DD()
{
   int Halt_Status = HHH(DD);
   if (Halt_Status)
     HERE: goto HERE;
   return Halt_Status;
}
>
int main()
{
   HHH(DD);
}
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HHH returns false indicating that it cannot
correctly determine that its input halts.
True would mean that its input halts.
>

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But false indicates that the input does not halt, but it does.
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>
I made a mistake that I corrected on a forum that allows
editing: *Defining a correct halting decidability decider*
1=input does halt
0=input cannot be decided to halt

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And thus, not a halt decider.
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Sorry, you are just showing your ignorance.
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And, the problem is that a given DD *CAN* be decided about halting, just not by HHH, so "can not be decided" is not a correct answer.

>
A single universal decider can correctly determine whether
or not an input could possibly be denial-of-service-attack.
0=yes does not halt or pathological self-reference
1=no  halts

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Conventionally the value 0 is used for "no" (for example, no errors)
and value 1 for "yes". If there are different "yes" results other

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A Conventional halt decider is 1 for halts and 0 for does not halt.

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That is because conventionally the question is "Does thing computation
halt?" so "yes" means the same as "halts".
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0 also means input has pathological relationship to decider.

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It cannot mean both "does not halt" and "has pathological relationship
to decider". Those two don't mean the same.
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In other words 1 means good input and 0 means bad input.

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That is not the same in other words.
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An input is good in one sense if it specifies a computation and bad if
it does not. In the latter case the decider is free to do anything as
the input is not in its scope.
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In another sense an input is good if it is as the user wants it to be.
If the user wants a non-halting computation then a halting one is bad.
>

 *Semantic property of well-behaved is decided for input*
It the program well behaved thus halts?
else The program is not well behaved.
 

And since DDD halts for all the DDD built on a actual decider HHH, all those DDD are well-behaved, so any HHH that returns 0 is just wrong.
Remember, "Halting" is about the behavior of the actual exectution of the program the input represents, which since it must be a representation of a program, it must include ALL the code used by DDD, including the code of the HHH that it calls, which makes it a different input than the DDD that calls the non-aborting HHH, which is non-halting and thus not good, but that HHH doesn't report that fact.