True, False, Other | Non-Classical Logic | Attic Philosophy

In classical logic, sentences are always either true or false (but never both). That rule breaks down in non-classical logic, and things get more interesting! In this video, we look at logics with 3 truth-values: True, False, and some other value, which might be Neither true nor false, for even Both true and false. We'll look at how to understand the logical connectives. In a follow-up video, we'll look at the some different 3-valued logics. 00:00 - Intro 01:28 - The Basic Idea 02:16 - Relational semantics 03:19 - Three-Valued Semantics 04:24 - Truth-Functional Semantics 04:53 - Negation 05:33 - Truth Matrices 06:19 - Conjunction 08:10 - Disjunction 09:04 - Semantic clauses 12:11 - Fuzzy Logic 13:46 - Implication 16:19 - Lukasiewitz matrix More videos on non-classical logic coming next! If there’s a topic you’d like to see covered, leave me a comment below. Links: My academic philosophy page: markjago.net/ My book What Truth Is: bit.ly/JagoTruth Most of my publications are available freely here: philpapers.org/s/Mark%20Jago Get in touch on Social media! Instagram: www.instagram.com/AtticPhilosophy Twitter: twitter.com/PhilosophyAttic #logic #philosophy #semantics