Active learning ideas
Logic is the 'grammar' of inquiry. This topic distinguishes between deductive reasoning (where the conclusion *must* follow from the premises) and inductive reasoning (where the conclusion is *likely* based on evidence). Students learn to evaluate arguments not just by whether they agree with them, but by their logical structure: validity, soundness, and strength.
Activity 01
Stations feature advertisements, political speeches, and social media posts. Students must identify the logical fallacies (e.g., Ad Hominem, Straw Man) and rewrite the argument to be logically sound.
What makes an argument logically valid?
Activity 02
Groups are given a 'conclusion' and must work backward to create a valid and sound deductive argument. They then present it, and other groups must try to 'break' it by finding a flaw in the premises.
How do we evaluate the soundness of premises?
Activity 03
Students are given five arguments and must categorize them as deductive or inductive. They share their reasoning with a partner, focusing on whether the conclusion is 'guaranteed' or just 'probable.'
What are the limitations of inductive reasoning?
A few notes on teaching this unit
Watch Out for These Misconceptions
A 'valid' argument is the same as a 'true' argument.
Validity only refers to the *structure* (if the premises were true, the conclusion would follow). An argument can be valid but have false premises. Using 'silly' valid arguments (e.g., 'All cats are aliens...') helps students see this distinction.
Inductive arguments are 'weak' because they aren't certain.
Most of our knowledge (including science) is inductive. It's not 'weak'; it's 'probabilistic.' Peer-reviewing scientific claims helps students appreciate the strength of well-supported induction.
Methods used in this brief