49:56

Wittgenstein's Tractatus

47:49

Quine's Ontology

51:06

Russell on Denoting, Part 2

29:12

Russell's Logical Atomism

8:13

A.C. Grayling - How Belief Systems Work

49:26

Frege on Thought

46:37

Quine on Carnap on Logical Truth

45:00

Husserl: Phenomenology and the Life World