Sujet : Re: Analytic Truth-makers
De : janburse (at) *nospam* fastmail.fm (Mild Shock)
Groupes : comp.theory sci.logicDate : 23. Jul 2024, 21:57:39
Autres entêtes
Message-ID : <v7p5g1$8c1e$1@solani.org>
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Since generations logicians have called sentences
which you clumsily call "not a truth-bearer",
simple called "undecidable" sentences.
A theory is incomplete, if it has undecidable
sentences. There is a small difference between
unprovable and undecidable.
An unprovable senetence A is only a sentence with:
~True(L, A).
An undecidable sentence A is a sentence with:
~True(L, A) & ~True(L, ~A)
Meaning the sentence itself and its complement
are both unprovable.
olcott schrieb:
~True(L,x) ∧ ~True(L,~x)
means that x is not a truth-bearer in L.
It does not mean that L is incomplete