Liste des Groupes | Revenir à c theory |
On 5/11/2025 9:49 PM, dbush wrote:And in doing so you're changing the input.On 5/11/2025 10:46 PM, olcott wrote:I am talking about every element of an infinite setOn 5/11/2025 9:38 PM, dbush wrote:>On 5/11/2025 10:36 PM, olcott wrote:>On 5/11/2025 9:28 PM, dbush wrote:>On 5/11/2025 10:14 PM, olcott wrote:>On 5/11/2025 8:59 PM, dbush wrote:>On 5/11/2025 9:56 PM, olcott wrote:>On 5/11/2025 8:27 PM, Richard Damon wrote:>On 5/11/25 8:48 PM, olcott wrote:>On 5/11/2025 7:38 PM, Mike Terry wrote:>On 11/05/2025 18:11, Richard Heathfield wrote:>On 11/05/2025 17:44, olcott wrote:>Any yes/no question where both yes and no are the>
wrong answer is an incorrect polar question.
Either DD stops or it doesn't (once it's been hacked around to get it to compile and after we've leeched out all the dodgy programming).
Done that. It still stops.
>>>
If the computer cannot correctly decide whether or not DD halts,
The decider says it doesn't stop..
>we have an undecidable computation,>
No no, that doesn't make sense. DD stops, and there are lots of partial halt deciders that will decide that particular input correctly. PO's DD isn't "undecidable".
>
No single computation can be undecidable, considered on its own! There are only two possibilities: it halts or it doesn't. In either case there is a decider which decides that /one specific input/ correctly. By extension, any finite number of computations is decidable - we just have a giant switch statement followed by returning halts/ neverhalts as appropriate. If the input domain has just n inputs, there are 2^n trivial deciders that together cater for every combination of each input halting or never halting. One of those deciders is a correct decider for that (finite domain) problem.
>
The HP is asking for a TM (or equiv.) that correctly decides EVERY (P,I) in its one finite algorithm. That is what is proven impossible. The trick of having a big switch statement no longer works because there are infinitely many possible inputs.
>
Decidability for just one single input is trivial and not intersting.
>and therefore some computations are undecidable, so Turing's conclusion was right. Who knew? (Apart from practically everybody else, I mean.)>
>
Mike.
DDD emulated by HHH according to the rules of
the computational language that DD is encoded
within already proves that the HP "impossible"
input specifies a non-halting sequence of
configurations.
No it doesn't.
>
_DDD()
[00002172] 55 push ebp ; housekeeping
[00002173] 8bec mov ebp,esp ; housekeeping
[00002175] 6872210000 push 00002172 ; push DDD
[0000217a] e853f4ffff call 000015d2 ; call HHH(DDD)
[0000217f] 83c404 add esp,+04
[00002182] 5d pop ebp
[00002183] c3 ret
Size in bytes:(0018) [00002183]
>
Show all the steps of DDD emulated by simulating
termination analyzer HHH according to the rules
of the x86 language
Which it doesn't do as you have admitted on the record:
>
I am daring you to show what they should be.
You know you can't because you know you are a liar.
>
Category error. Algorithm HHH does one thing and one thing only. There is no "what it should be" because it *is* only one thing.
>
Show the exact sequence of machine address steps of DDD
such that the DDD emulated by some HHH
Changing the input is not allowed.
There is no change of input you are a liar.
>
If you change function HHH, you no longer have algorithm DDD, which means you're changing the input.
>
Changing the input is not allowed.
you nitwit.
Les messages affichés proviennent d'usenet.