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From a channel Lumen includes in full: Jeffrey Kaplan, a philosophy professor, gives clear chalkboard-style lectures on philosophy of language, logic, ethics and jurisprudence (Frege, Kripke, Russell), plus well-structured study-skills lectures for college students.

A 4-minute video from Jeffrey Kaplan's catalogue; the title names its topic.

Video by Jeffrey Kaplan, played through YouTube's embedded player.