@TechConnectify I think troubleshooting is a subset of deductive reasoning, and that is useful in many different contexts. I agree it's one of the most practical applications, so it might as well be the 101 course.

And later we get to "discerning what you know from what you assume". Other topics: stating a problem clearly enough for someone else (or yourself) to understand it. Distinguishing correlation from causation etc.

About troubleshooting, always remember: sometimes trouble shoots back.