Lisa Duffy

Welcome to our Logic Class!

Lisa Duffy’s Logic class is concluded with the 15 weeks of material presented this fall. We hope you enjoyed and benefited from the class. The Logic lessons will remain archived on the site. – Ed., January 2013

Introduction / Synopsis

This course will provide an introduction to a number of informal fallacies encountered in everyday life. Recognizing and responding to this deceptive and faulty reasoning helps prepare students to communicate effectively and persuasively, while equipping them to avoid falling prey to deception. Students will compile a Logic notebook, and will be presented with examples of a new fallacy each week. Through a variety of activities divided into daily assignments, students will learn to analyze statements, questions, advertisements, and arguments, and to identify faulty reasoning contained in each. Students will study examples, learn definitions, and apply their new knowledge and understanding by finding examples in the world around them. A weekly quiz will assess their understanding. The course is projected to cover a 15-week semester. A tentative outline follows:


Week 1 – Introduction Week 2 – Appeal to Pity Week 3 – Appeal to Fear Week 4 – Appeal to the People


Week 5 – Red Herrings Week 6 – Ad Hominem Week 7 – Tu Quoque Week 8 – Snob Appeal


Week 9 – Appeal to Faulty Authority Week 10 – Straw Man Week 11 – Begging the Question Week 12 – Appeal to Ignorance


Week 13 – Equivocation Week 14 – Hasty Generalization Week 15 – Quoting out of Context

Please see the Week 1 – Introduction material for an explanation of how the course content will be introduced, practiced, and assessed.

Go to the Archived Lessons.

Lisa Duffy has been serving the homeschool community as a teacher, mentor, and curriculum developer since she and her husband began their own homeschool journey 16 years ago. Lisa’s educational background includes a BA in Psychology, a JD in Law, and an M.Ed in Education. She worked in each of these professions before having children, and has used skills from each in her career as a homeschool mom. As a certified teacher, Lisa has taught in public, private, and church schools. She is known for her creative teaching style, engaging lessons, and her respect for students. In addition to teaching, Lisa enjoys volunteering, writing, storytelling, and sharing her love of learning.