Many of the questions on our site are answerable with a sentence or two. Even the most complex questions on our site could be answered in only a couple sentences. Those answers are not very likely to be useful or high quality, but they still do answer the question.
These answers typically do not add to other, more sophisticated answers, and are not likely to be useful to future visitors or the OP. For example, on language-choice questions these answers frequently pop up, although that's not the only place.
These answers are often downvoted, but if they provide minimal benefit to future viewers and will not likely be useful to the OP, should we be doing more to encourage downvoting? Should we be adding post notices1 to them? Should we be deleting them?
1 A post notice is a message that a moderator can apply to an answer (for example, this one) which reads:
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.