Completeness Theorem for Hilbert Proof System Instance 2 and Boolean Interpretations

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Theorem

Instance 2 of the Hilbert proof systems is a complete proof system for boolean interpretations.

That is, for every WFF $\mathbf A$:

$\models_{\mathrm{BI}} \mathbf A$ implies $\vdash_{\mathscr H_2} \mathbf A$


Proof


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Also see

The Soundness Theorem for Hilbert Proof System Instance 2 and Boolean Interpretations in which it is proved that:

If $\vdash \mathbf A$ then $\models \mathbf A$.


Sources

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