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On Tue, 2025-07-15 at 20:02 -0500, olcott wrote:The classic textbook example is NOT one of those cases.On 7/15/2025 7:47 PM, André G. Isaak wrote:This is a typical "learn-by-rote".On 2025-07-15 18:39, olcott wrote:>On 7/15/2025 7:34 PM, André G. Isaak wrote:>On 2025-07-15 17:53, olcott wrote:>On 7/15/2025 6:45 PM, André G. Isaak wrote:>On 2025-07-15 17:35, olcott wrote:>>You still make the same mistake with the implication operator.>
That has always been the wrong operator for PROVES.
You're being an idiot. The principle of explosion can be stated
either in terms of implication or proof. I prefer implication. I'm
not mistaking one symbol for another. I'm saying exactly what I
intend to say.
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André
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Yet implication is not even truth preserving.
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You seem to be using some private definition of 'truth preserving'.
Did you get that one from claude.ai as well?
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André
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the characteristic of an argument where,
if the premises are true, the conclusion
must also be true.
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When the antecedent is false the consequent
can be true with the "→" operator.
And how would that make it non-truth preserving?
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If you start with falsity end end up with truth then
the operation was not truth preserving.
>
If there are tens of thousands of textbooks that
disagree then they are necessarily incorrect when
we go by the compositional meaning of the terms
of "truth" and "preserving". To make a term of the
art meaning that disagrees with the compositional
meaning has always been dishonest.
>
The Halting Problem is clear... there is always a counter-case an
assumed H cannot solve.
This is FACT, not influenced by ANY theory/rule: "1+1=2", Logic,..., have no--
effect on this fact.
You're very confused. Since you seem to trust/overrely on wikipedia, you>
can check against the following:
>
https://en.wikipedia.org/wiki/Truth_function#Algebraic_properties
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André
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