I have often wondered at the practice on Stack Overflow, Server Fault, and the other sites where someone will ask a question and an answer will come in that says "Look here: https://link elsewhere". Rarely will the link have exactly the answer necessary -- often it's an entire article -- yet these answers get voted up.
Why is that, exactly? I realize this is subjective, but my own thoughts are that one should try and give the answer (even if the answer is 'no, it can't be done' or 'no, I don't think it can be done' -- very different answers) and then if you have a link that explains it, go ahead and post it within the answer.
What does the community think about this?