I know our policy is that answers should be fairly fully worked out - not something like "Logistic regression should do it", for example.
However, if you hover over the "add comment" after a question, it says "use comments to ask for more information or suggest improvements. Avoid answering questions in comments".
Something like "logistic regression should do it" does answer the question, at least partially. It is not a request for information or a suggested improvement.
So, the hover text disagrees with our policy. One or the other should change.