From the help:
Why and how are some answers deleted?
Answers that do not fundamentally answer the question may be removed. This includes answers that are:
commentary on the question or other answers
asking another, different question
“thanks!” or “me too!” responses
exact duplicates of other answers
barely more than a link to an external site
not even a ...
I'm only posting this answer to give my opinion and relevant information I have found. Obviously I would also like other people's opinions as well.
If a post attempts to answer the question, it should not be deleted or moved to a comment. Wrong answers or "poor quality" right answers should be dealt with by voting and commenting. See these posts on meta:
I mostly agree with @fileunderwater's answer but came across another example where I thought retagging was clearly appropriate so decided to make a separate answer:
What is this small tissue structure found in kidney?
I added the "endocrinology" tag to that question, because the answer is that the structure referenced was in fact an endocrine gland. Based ...
I absolutely agree with user @theforestecologis 's proposal.
Whatever our view to study is interdisciplinary or not; the nature is itself interdisciplinary... so there are connections or correlations among different areas and ways of studies.
So theoretically it is possible an asker asked a question focused within subject or topic X; but its answer lies ...
To me, the first should definitely be retagged (since the current tag is incorrect), but I'm hestant to the second one. The question doesn't have anything directly to do with either botany or zoology, even though those are used as examples in the answers.
Generally, obviously missing or incorrect tags should be edited, but I think tags should have a clear ...