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From: olcott <polcott333@gmail.com>
Newsgroups: sci.logic
Subject: Re: I just fixed the loophole of the Gettier cases
Date: Sat, 14 Sep 2024 16:26:42 -0500
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On 9/13/2024 3:09 AM, Mikko wrote:
> On 2024-09-13 01:17:15 +0000, olcott said:
> 
>> On 9/12/2024 3:54 AM, Mikko wrote:
>>> On 2024-09-11 12:14:53 +0000, olcott said:
>>>
>>>> On 9/11/2024 2:05 AM, Mikko wrote:
>>>>> On 2024-09-10 13:23:39 +0000, olcott said:
>>>>>
>>>>>>
>>>>>> They all have negation as failure, the key element
>>>>>> required to reject self-contradictory expressions.
>>>>>
>>>>> The not operator of Prolog is not a part of Horn clause system. It is
>>>>> not the same as the not operator of ordinary logic. Therefore one nust
>>>>> be careful with its use and interpretation.
>>>>>
>>>>> You have not defined what you mean with "reject" and how that relates
>>>>> to the behaviour of Prolog programs.
>>>>>
>>>>
>>>> https://en.wikipedia.org/wiki/Negation_as_failure
>>>> The failure to prove X from Facts and Rules
>>>> means that X is untrue yet not necessarily false.
>>>>
>>>> The failure to prove X or ~X from Facts and Rules
>>>> means that X is untrue and unfalse, thus not a
>>>> truth bearer.
>>>
>>> X may represent a real world claim that is either true or false but
>>> cannot be determined either way with Prolog rules.
>>>
>>
>> When a Prolog Fact is specified that cats are animals
>> then we can know by Prolog Facts that cats are animals.
> 
> We know that even if no Prolog fact about that is specified.
> 

Not one single being in the universe understood
that "cats are animals" was anything but pure gibberish
until this was specified.

Prolog is like a 100% empty mind until we tell it
some facts it literally knows nothing.

When we tell it "cats are animals" is a fact it knows
literally nothing else.

The entire verbal model of the actual world is built
this same way.

"The Earth is spherical" makes exactly as much sense
as "dgfjlok ergkoi rti932rm 45 njedfww" until specified
otherwise.

>>>>>> x = "this sentence is not true
>>>>>> if ~True(L,x) & ~True(L,~x) "x is rejected as invalid input"
>>>>>
>>>>> What connection that has to Prolog?
>>>
>>> Anyway, you still have not defined what you mean with "reject" and how
>>> that relates to the behaviour of Prolog programs, and you have not
>>> answered the last question.
> 
>> I have defined this at least 100 times.
> 
> As you didn't point to even one such definitions I think you have not.
> 
>> ?- LP = not(true(LP)).
>> LP = not(true(LP)).
>> ?- unify_with_occurs_check(LP, not(true(LP))).
>> false.
>>
>> The last line that returns false rejects LP.
> 
> No, it does not reject, it just answers the question on the second last 
> line.
> Another answer about LP is on the third last line and there is no rejection
> there.
> 


-- 
Copyright 2024 Olcott "Talent hits a target no one else can hit; Genius
hits a target no one else can see." Arthur Schopenhauer