3:44Logic 2010: Derivations: 2.066 (DM: DeMorgan's Law 2 & 4)Philosopher Logic10.0K viewsView & Download
7:55Logic 2010 - Conditional and Indirect Derivations, and Writing Show LinesCory Lewis4.5K viewsView & Download
1:21Logic 2010: Derivation: 3.231 (AV: Alphabetic Variance 1)Philosopher Logic874 viewsView & Download