This is really good. It states a lot of things that it has taken me time and experience to learn, which I would have benefited from knowing early in my career. Authority is not always right, people in power have ulterior motives other than doing the right thing, when investigating a problem remove all assumptions and determine the root cause (this is both the hardest to do and also the best advice I've come across for any IT technical worker IMO). So many times I've seen people claim to have solved a problem by throwing a solution at it that appears to have worked, without determining the root cause, only for the problem re-manifest itself weeks or months later in a different manner.