I've noticed several posts (like this question) lately that are extremely simple questions. In this question, the OP asked for an explanation as well as some examples. At the time of this writing, the accepted answer only has 21 votes while a comment on the question has 31.
The answer provides both an explanation and an illustrated example while the comment only provides an example (granted a good one).
My question is, when should simple questions be given answers like this in the comments? My understanding is that answers should never be given in the comments but here is a fairly popular question (near 2k views) where a commenter was more rewarded than an answer. Any clarification would be great!