(The question came to my mind when reading an answer but this is just for reference).
Is there a consensus about what up- and down-voting mean for answers? What would be the "voting reaction" to the following thoughts regarding an answer? (note that the up/down voting arrows are labelled "useful/not useful")
- it is an objectively correct answer, and I think that OP should do that (ex: according the the Wakanda law, you must file vacation 2 weeks before they are due)
- it is an objectively correct answer, but I think OP should not do that (ex: ..., you can raise the issue with RH because ...)
- it is an incorrect answer, but I think OP should do that (ex: next time yell at him as well)
- it is an incorrect answer and OP must not do that (next time punch him in the face)
(note that "objectively" disappeared in the "incorrect" answers because the only ones I could come up with in the third bullet is subjective)
The thing is that people have different opinions and I may or may not agree with them. They may still be "proper" opinions that make sense (the one I referred to is an example - it makes sense but I disagree). Using the word "useful" does not help that much because of its vague meaning (it is "useful" because it gives an opinion (→ upvote), is it "useful" because I agree with it (→ upvote), or the other way round)