I asked whether you should use edits to fix an answer that is incorrect, and the consensus was that you should not:
should you use edits to change the conclusion of an answer, or should you post a new answer in that case?
OK. In that case, can we add that information to the text that appears above the "edit" box? The text currently says:
"Your edit will be placed in a queue until it is peer reviewed. We welcome all constructive edits, but please make them substantial. Avoid trivial edits unless absolutely necessary."
We could add a sentence which says:
"On the other hand, do not use edits to fix an answer that you believe is wrong (or, more generally, to substantially change the conclusion of the answer). In this case you should submit your own answer."
This would have helped me at the beginning, since I did not know this, and it's far from obvious.
(That text might be a default template that can be customized by sites like chemistry SE, but in that case I'm suggesting an edit to the default template.)