Does logic describe the world?

Wittgenstein on Meaning

Bertrand Russell's Philosophy

Introduction to Set Theory | Logic | Attic Philosophy

Natural Deduction for Intuitionistic Logic | Attic Philosophy

Russell's Paradox - a simple explanation of a profound problem

Possible worlds semantics

How Definite Descriptions work | Symbolic Logic Tutorial | Attic Philosophy

How to understand Sequent Calculus

Wittgenstein's Tractatus

How to Read Logic

How to do Modal Logic | Attic Philosophy

How to Argue - Philosophical Reasoning: Crash Course Philosophy #2

A History of Philosophy | 74 Bertrand Russell -- Logical Atomism

Rules for Natural Deduction | Attic Philosophy

Gottlob Frege - On Sense and Reference

Russell's Logical Atomism

Aristotelian Logic

Descartes: Knowledge and Scepticism

Locke, Berkeley, & Empiricism: Crash Course Philosophy #6

Why Study Logic?