I noticed that:
- answers on this site usually get sorted descendingly according to their score,
- in general, answers are either upvoted or left untouched rather than downvoted, and
- I (and, presumably, most of us) do not have the time to read ALL the answers thoroughly if there are many of them, but do have time to scroll through the topmost.
This leads to the situation that in the presence of several answers, the topmost answers are likely to increase their score and stay on the top, regardless of whether there are better answers below.
Is there a technical means to avoid this bias? Surely, you can sort by active, oldest, votes, but those sorting modes would simply remove one bias and introduce a different bias instead. Moreover, the default sorting mode is "votes". My suggestions would be to introduce some randomness into the orders. I'm not sure how much randomization is necessary (fully random or taking the votes orders and moving a random answer to the top): feel free to comment.
EDIT: Following the comment of Massimo Ortolano, if someone could migrate to the general meta discussion, I'd not be against.