I would add that not many are willing to fail in order to learn/master something either. I would know, I fail a lot. But generally I learn from my mistakes
There's learning and there's understanding how to troubleshoot.
Frank knows how to troubleshoot even when there seems to be a lot of possibilities.
We get guys on the forums that can't even begin to troubleshoot even when the possibilities can be narrowed quickly.
For example, look at how many posts just at FABO where someone has to ask "do the headlights work,? do any pof hte lights work?"