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Questionnaire-2024
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Questionnaire-2024/decidability/0006.tex

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added sound and complete for prop nd chapter
3 weeks ago
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  1. \item The proof of completeness for natural deduction for propositional logic contains the following sub-proof:
  3. $$\text{If~} \models \phi \text{~holds, then so does~} \vdash \phi.$$
  5. Discuss the proof idea of performing this step of the completeness-proof.