Reasoning by analogy is the main topic of Chapter 12, by Richard Epstein in
Critical Thinking. A comparison becomes
reasoning by analogy when it is part of an argument. On one side of the comparison we draw a conclusion, so on the other side we should conclude the same. To best illustrate this concept, I will use an example...
- Women can vote. Women can run for presidency. Therefore, women should be able to attain high powers in a Church.
Reasoning by analogy starts with a comparison, but not every comparison is an argument. To add on to this topic, there are seven ways to evaluate an analogy, which you will ask yourself these seven questions...
1. Is this an argument? What is the conclusion?
2. What is the comparison?
3. What are the premises? (one or both sides of the comparison)
4. What are the similarities?
5. Can we state the similarities as premises and find a general principle that covers the two sides?
6. Does the general principle really apply to both sides? Do the differences matter?
7. is the argument strong or valid? is it good?