I would add to @Robert's answer, and emphasize, that often a wrong answer will be accepted.
The question often comes up, how to deal with wrong accepted answers...
(see for example the answers to this question on the Meta.Security site, "How do you avoid answers with ... flaws?" It refers to technical issues there, but the same principles apply...)
Commenting, both to the answerer and to the OP, downvoting, and alternate answer, all can help fix this.
However, take into account that, as @Robert said, sometimes it's not about what is right, but about what is helpful. As you said, sometimes there are two correct, yet conflicting, answers.