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Part 8 Symbolic Logic (Easy proofs using rules of implication) - YouTube
![[Logic] Proofs and Rules #1 - YouTube](https://i.ytimg.com/vi/m2j0TX-e8NY/maxresdefault.jpg)
[Logic] Proofs and Rules #1 - YouTube

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Proof Logic - Unit 2: Proof & Logic #3: Types/Parts of Statements Notes

why is this logic proof wrong? - Mathematics Stack Exchange

1. Introduction — Logic and Proof 3.18.4 documentation

Language, Proof, and Logic: Second Edition, Barker-Plummer, Barwise

Is this logic proof valid? - Mathematics Stack Exchange