I want to finish this book by stressing the importance of reasoning. The ability to find the causes of problems comes not only from practice, but also from the skill of analyzing problems.

If you encounter a problem, I recommend you think it over thoroughly before choosing the troubleshooting techniques you believe are best suited to that particular issue.

Choosing a good action path at the first step will save you much time. And a thorough diagnosis can prevent not only the issue you noticed right away, but also other future problems stemming from the same cause.