Propositional Logic Truth Trees (and, or, not)

In this video on #Logic / #PhilosophicalLogic I introduce truth trees, inconsistent sets of wffs, and rules for disjunction, conjunction, and the negation. We talk about disjunction decomposition, conjunction decomposition, double negation, negated disjunction decomposition, and negated conjunction decomposition. Then, we do an example of a truth tree.

0:00 [Intro]
0:17 [What is a truth tree?]
2:51 [Rule: Conjunction Decomposition]
4:04 [Rule: Disjunction Decomposition]
5:02 [Rule: Double Negation]
5:20 [Rule: Negated Conjunction Decomposition]
7:39 [Rule: Negated Disjunction Decomposition]
8:47 [Inconsistency and Example #1]
10:51 [Example #2]

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-Playlists-
Logic:    • Philosophical Logic (2024) Lectures  

-Recommended Textbooks-
The Logic Book: https://amzn.to/31h2qR8
Modal Logic for Philosophers (Garson): https://amzn.to/3dECGn4
A Friendly Introduction to Mathematical Logic: https://amzn.to/37hMYZa
An introduction to Formal Logic with Philosophical Applications: https://amzn.to/3j3J9sx

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