I'm the reason that answer was presented to you, because I'm the mod that processed the flags that collected on it indicating that it's not really an answer to the question.
I actually spent a bit of time on it, and almost edited it, but every edit I could think up left me with something that looked, at least to me like a comment at best. I did agree with the flags, but I generally favor improving terse answers that don't really meet our quality guidelines over just deleting them, if they can be saved.
So, when I elected to just delete it after a few minutes, it was because I felt like it was much more of a 'me too' comment left as an answer than an actual answer.
We have become rather strictbecome rather strict with quality related flags for this very reason. When we validate them by taking a destructive action, we know there's a very good chance that they'll be used as a review audit. They need to be cut and dry, or at least darn close to it.
So, in this case, I think I probably made a mistake. I could have validated the flags (I did fully agree with them) and left the answer after at least a minor edit to improve it a bit, which would have kept it out of the audit. The fact that I deliberated for a few minutes means that it wasn't really cut and dry after all, and I will keep this experience in mind going forward (and, well, this is a good example of why we need to be extremely accurate). I'm a seasoned moderator with two years under my belt, if I had a hard time making heads or tails of it, I should have definitely made sure it didn't become an audit.
However, we are human, and we do make mistakes occasionally.