A while ago, I posted an answer to this question, and since then my answer has been downvoted multiple times for reasons I cannot discern. I'm not too bothered by any aspect of this other than the lack of reason. Here's what I mean:
When one hovers over the downvote arrow, a box displays saying "This is answer is not useful." I will call this the Official motivation for downvoting an answer. My answer was, I believe, useful. Barring malice, which is unlikely, the only other reasonable possibility I can imagine are the voters' (or my own) skewed perception of utility.
One thing that I can imagine warranting a downvote is if my answer was posted significantly after another complete answer. This is not the case, however. Another, more likely, possibility is that the downvoters found my answer useless because it had less information than the other answer.
This is true. However, I provided all the information requested by the questioner. The more popular answer provided more information, but it wasn't necessary; it seemed more an exercise of the researching muscles than in efficient questioning-and-answering.
EDIT: Unsure whether this could be remotely construed as poor form, but in my answer I referenced how the asker did not specify which game of a series of games they were asking about. See my answer for specifics.
TLDR: My answer was called "useless," and yet it was not. Is this through misinterpretation of the voting system, or something else?