Results for: 'Modus tollens'
proofs with modus tollens and wedge out PHIL013AB
A video explaining two proof rules, modus tollens and wedge out, which can be used in proofs for PHIL013.
Introduction to proofs PHIL 013AB
A video on what proofs are, which explains the concept of simple derivation, and how to do proofs with one proof rule, Modus Ponens.