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Is this logic sentence true or false: ∃G (G ↔ ¬Provable(G))

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peteolcott

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May 7, 2019, 11:18:07 PM5/7/19
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My hypothesis is there is no such G because G ↔ ¬Provable(G)
is self-contradictory causing the LHS to have a truth value
that is always out-of-sync with the RHS, making the above
expression simply false.

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peteolcott

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May 8, 2019, 1:22:14 AM5/8/19
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On 5/7/2019 10:18 PM, peteolcott wrote:
> My hypothesis is there is no such G because G ↔ ¬Provable(G)
> is self-contradictory causing the LHS to have a truth value
> that is always out-of-sync with the RHS, making the above
> expression simply false.
>

If G was provable this makes the RHS false and the LHS true
If ~G was provable this makes the RHS true and the LHS false
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