Like Dislike Agree Disagree Happy Funny Surprised Sad Angry Winner Friendly Informative Creative Useful Optimistic Boring Old Bad Spelling
As well as whatever other options the site owner may have added. So there are systems out there which differentiate between a post someone disagrees with and one that's low quality, and they do make sure 'disagree' is not counted as a like or dislike on the database level too.
...which don't actually mean anything in practice because (1) disagreement effects perception of quality, so even honest voters in a system which distinguished the two will still be likely to mark a post that they disagree with as low wuality, and (2) people in practice, given the option, will mark a comment or post in the way that produces the effect they wish to happen to it, so if they want a post demoted because they disagree with it, and the forum offers marks for disagree which don't demote and some other mark which does demote, they choose the latter.
Maybe it stops holding up on Reddit scale though.