What is Wrong with Harry and Mary?
Once upon a time: A guy named Harry and his girlfriend Mary had an argument. Mary started winning, so Harry punched her in the face!
What was Harry’s Flaw in Reasoning?
A) Two Wrongs Don’t Make a Right
B) Sweeping Generalization
C) Appeal to Pity
D) Attacking the Arguer (ad Hominem)
What is wrong with Harry and Mary? is an edgy, fun and interactive way to introduce the world of Informal Fallacies in logic.
We start the story...your students continue and finish the story.
File is PPT so you can make any necessary adjustments or extensions.
Full suggested lesson plan.
OBJECTIVE: 1. Introduce students to the concepts of Informal Fallacies/Flaws in Reasoning and how they affect everyday decision making. 2. Motivate the students to learn more about Logic.
1. Ask the students to come up with some examples of “crazy” celebrities in Pop Culture. Ask them why they think these people are “crazy”. Can the students identify any specific reasons beside…”they are crazy”? (5 min)
2. Explain that there is a way to categorize “crazy” thinking. Introduce and discuss the concept of Informal fallacies and Flaws In Reasoning. Read or show them the definition provided. (5 min)
3. Go over each of the 10 Common Informal Fallacies. Elicit examples and responses from the group. (10 min)
4. Introduce the story of Harry and Mary. Have the students write down their answers to the 5 questions. (10 min)
5. Check the answers. (5 min)
6. Break the students into pairs or small groups. Explain that they students should try to continue the story and create 5 more questions using the remaining Informal Fallacies. (15 min)
7. Have a couple of the pairs/groups share their story and questions with the class. (5 min)
8. Review the main points of the lesson and dismiss the class.
IMPORTANT NOTE: This is a one hour lesson plan based on class size from 4-20 students. Please adjust according to your time constraints.