As considered and encouraged within intellectual or academic endeavors, not interpersonal ones — but surely I needn't worry about you falling into thinking the latter, right?
Sometimes it's important to proceed with thinking that no, surely I have misunderstood the matter, e.g. that the author is correct AND that I am dumb.
Sometimes it's important to consider that maybe — just maybe — suchandsuch is not 100% correct; they might not be 100% wrong, but something does smell funny here.
Points to avoid
- Make sure that you aren't taking issue with some small AND insignificant point (note: SubtletyAndSignificance, or that small/subtle things can be significant, but that isn't always the case), then using that as a means of decrying the thing as a whole, declaring that the thing is wrong/bad
Subtly mentioned above:
Binary Truth vs. Degrees of Truth (Probabilistic Truth considerations; Systems-oriented?)