Lesson 1.3: Deduction vs. Induction
In this lesson we will make a distinction between two kinds of reasoning, deduction and induction. Before getting into the lesson, consider the following. In a well known story, Sherlock Holmes, upon meeting John Watson for the first time in his life, correctly predicted that Watson had just returned from military service in Afghanistan. When asked how he knew this, Holmes answered that he "deduced" it from the fact that Watson was very tan on one side of his face, which was typical of British soldiers in Afghanistan because of the hats they customarily wore, which protected one side of the face from the sun.
Question: You've probably heard the name Sherlock Holmes being associated with "deduction." Did Holmes use the word "deduced" correctly, as understood in this lesson? Complete the activities below and you should be able to answer with confidence.
Objectives:
- Classify arguments as deductive or inductive.
Related Videos
- Deduction vs. Induction, Part I
- Deduction vs. Induction, Part II
Required Exercises
- Exercise 1.3 Part I