Introduction to proofs PHIL 013AB

By: mcweiner

A video on what proofs are, which explains the concept of simple derivation, and how to do proofs with one proof rule, Modus Ponens.

proofs with modus tollens and wedge out PHIL013AB

By: mcweiner

A video explaining two proof rules, modus tollens and wedge out, which can be used in proofs for PHIL013.