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From: olcott <polcott333@gmail.com>
Newsgroups: comp.theory
Subject: Re: How do computations actually work?
Date: Sat, 24 May 2025 10:13:00 -0500
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On 5/24/2025 2:39 AM, Mikko wrote:
> On 2025-05-23 16:10:19 +0000, olcott said:
> 
>> On 5/23/2025 2:14 AM, Mikko wrote:
>>> On 2025-05-23 03:31:15 +0000, olcott said:
>>>
>>>> On 5/22/2025 10:23 PM, wij wrote:
>>>>> On Thu, 2025-05-22 at 21:47 -0500, olcott wrote:
>>>>>> [cut]
>>>>>
>>>>> Q: How do computations actually work?
>>>>> A: Computation is merely step-by-step algorithm.
>>>>> Nothing says it has to be TM.
>>>>>
>>>>> Do the exercises in textbooks first before any claim of it.
>>>>>
>>>>
>>>> int main()
>>>> {
>>>>    DD(); // by what steps can the HHH that DD calls
>>>> }       // report on the behavior its caller?
>>>
>>> If we don't insist that the report be correct:
>>> 1. guess
>>> 2. tell what was guessed
>>
>> This does not work because all computable functions
>> that implement termination analyzers must compute
>> the mapping from their input finite string according
>> to the behavior that it specifies.
> 
> Wrong. There is no need to compute "the" mapping if a the report
> needs not be correct. Some other mapping is enough to produce
> some report.
> 

int sum(int x, int y) { return 5; }
Does not compute any function because it ignores its inputs.

-- 
Copyright 2025 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer