I recently came across a comment containing incorrect information, and I wasn't sure how to approach it.
Seeing as you cannot downvote comments, I decided to flag it, but there's no 'incorrect' flag, so I listed the flag as 'other' and manually entered 'incorrect'. I also left an additional comment (@commenter) explaining what/why their info was wrong, but that seems to edge into the realm of 'chat' (though in this case it happened to still be somewhat on topic for the question.)
What approach should I/we take to quantifiably incorrect information in our beloved community?
Edit: Here is the question in.. uh... question. Comments to be found under the accepted answer.