Re: William T. Parry gets rid of Disjunction introduction

On 7/6/2026 5:50 PM, André G. Isaak wrote:
> On 2026-07-06 16:36, olcott wrote:
>> On 7/6/2026 5:15 PM, André G. Isaak wrote:
>>> On 2026-07-06 15:54, olcott wrote:
>>>> On 7/6/2026 3:20 PM, André G. Isaak wrote:
>>>>> On 2026-07-06 14:04, olcott wrote:
>>>>>
>>>>>> ⊥  ⊢ ⊥ no explosion.
>>>>>
>>>>> Of course that's an explosion. It says that ⊥ demonstrates that ⊥ 
>>>>> is true.
>>>>>
>>>>
>>>> That you do not know what explosion is is not my mistake.
>>>> I thought that one of you two guys had a PhD in math
>>>> is that you or Alan?
>>>
>>> I do know what explosion is in the context of logic. Apparently you 
>>> do not. And I've never claimed to have a doctoracte in maths. My 
>>> background is in linguistics.
>>>
>>> André
>>>
>>
>> You are flat our wrong about explosion.
> 
> No. You claim that ⊥  ⊢ ⊥ which is to say that ⊥ can be derived from ⊥. 
> But in a consistent logic, ⊥ shouldn't be derivable from *anything*. The 


It is not explosive, full stop you are wrong.

> only way you can derive it is by introducing a contradiction into your 
> proof (that's what the first occurrence of ⊥ represents in your 
> statement) which is exactly what the principle of explosion says.
> 
>> I thought that
>> one of you two guys had a PhD in something. Most linguists
>> don't have a clue about formal semantics I spoke on sci.lang
>> for at least 10 years. None of them ever had much of a clue
>> about this.
> sci.lang is not populated by linguists. The vast majority of people who 
> post to that group are simply cranks like you. You can't infer anything 
> about what linguists may or may not know by following sci.lang.
> 
> André
> 
> 


-- 
Copyright 2026 Olcott

My 28 year goal has been to make
"true on the basis of meaning expressed in language"
reliably computable for the entire body of knowledge.
The complete structure of this system is now defined.

The entire body of knowledge expressed in language is
comprised of two types of relations between finite strings:
(a) *Axioms* Expressions of language that are stipulated to be true.

My system bridges the analytic/synthetic distinction by
expressly encoding all empirical "atomic facts" in a formal
language such as CycL of the Cyc project.

(b) *Inference Rules* Expressions of language that are semantically
entailed syntactically from (a) and/or (b).