Active learning ideas
Identifying Logical Fallacies is one of the most practical components of the Ontario Philosophy curriculum. It directly supports the A2 and A3 expectations regarding critical thinking and the application of philosophy to everyday life. Students learn to spot common errors in reasoning, such as ad hominem attacks, straw man arguments, and slippery slopes. This topic is particularly relevant in a multicultural and democratic society like Canada, where citizens must evaluate competing claims in political debates and social media.
Activity 01
Post various advertisements, political tweets, and opinion columns around the room. In small groups, students move from station to station with sticky notes, identifying the fallacies used and explaining why the reasoning is flawed.
What are the most common logical fallacies?
Activity 02
Assign students a topic to debate, but give each side a 'secret' list of fallacies they must try to use without getting caught. The opposing side must call out the fallacy by name as soon as they hear it to 'win' the point.
How do cognitive biases affect our reasoning?
Activity 03
Students work in groups to find a recent news clip or editorial. They create a 'Logic Map' that highlights any fallacies found and present a 'corrected' version of the argument that relies on sound reasoning instead.
How can we avoid fallacious reasoning in our own arguments?
A few notes on teaching this unit
Watch Out for These Misconceptions
If an argument contains a fallacy, the conclusion must be false.
This is the 'fallacy fallacy.' A conclusion can be true even if the reasoning used to get there is bad. Active learning activities where students find true conclusions supported by bad logic help clarify this subtle point.
Calling out a fallacy is a 'win' in a debate.
Simply naming a fallacy isn't enough; one must explain why it weakens the argument. Peer-to-peer coaching during debates helps students move from 'labeling' to 'explaining' the logical error.
Methods used in this brief
The Nature of Philosophical Inquiry
Students explore the origins of philosophical thought and the fundamental questions that drive human curiosity. They will differentiate between philosophical and non-philosophical inquiries.
8 methodologies
Deductive and Inductive Reasoning
This topic introduces the formal structures of logic, focusing on how to construct and evaluate deductive and inductive arguments. Students will learn to identify valid and sound reasoning.
8 methodologies