Arguments & Fallacies

Valid reasoning and common traps

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Valid: modus ponens (P, so Q) and modus tollens (not Q, so not P).
• Invalid: affirming the consequent and denying the antecedent.
• Watch for correlation ≠ causation and false dilemmas.

Steps

1. Valid arguments
2. Affirming the consequent
3. Which are valid?
4. Correlation
5. Find a counterexample
6. Name the fallacy