Recently, I flagged a two word answer from 2015. OP was asking how we know a cryptographic primitive is secure, and the answer contained exactly two words. In fact, the answer was so short that hidden MathJax had to be added to keep the system from rejecting it! The answer contained nothing but:
We don't.
While my flag was marked as helpful, no action was taken and the answer still remains. I imagine this is because the question had hit HNQ and such a "cute" answer got plenty of upvotes. However this is sending a bad signal as to the quality of the site. Is a two word answer really acceptable on this site?
Even OP had commented on it, calling it out as completely useless:
I just think it would be better if there was an argument, not just a two word answer. I get the impression that yyyyyyy was taking the mick. That's fine, but it ends up taking the mick out of not just the question, but the website and of you, because you think it's acceptable to post two words and add {}{}{}{} to pad the answer so it would be long enough to post and then get a gazillion votes because a lot of people don't want quality from an answer. I would expect this from Reddit.