I am wondering what is the concept of the bold part. A vivd example or explanation might be useful to get it.
Evaluating Analogies Because analogical reasoning is so common and has the potential to be both persuasive and faulty, you will find it very useful to recognize such reasoning and know how to systematically evaluate it. To evaluate the quality of an analogy, you need to focus on two factors.
- The number of ways the two things being compared are similar and different.
The relevance of the similarities and the differences.
A word of caution: You can almost always find some similarities between any two things. So, analogical reasoning will not be persuasive simply because of many similarities. Strong analogies will be ones in which the two things we compare possess relevant similarities and lack relevant differences. All analogies try to illustrate underlying principles. Relevant similarities and differences are ones that directly relate to the underlying principle illustrated by the analogy.
Extracted from the book " Asking the Right Questions"
A Guide to Critical Thinking M. Neil Browne