There are many words between these three conclusions, but I'm not sure any are necessary.
Madness string 122918
I used to subscribe to the 'no stupid questions' school of thought. But having been in the army, and now teaching this trade, there are indeed stupid questions. Like, I'd rather you ask before crashing my machines, but the fact that you are asking this shows a fundamental lack of understanding the basic concepts of something you supposedly learned a year ago.