Our guidelines for homework question say to use the self-study tag and tell what you've tried. But what about when a person says, "I have no idea where to start?"
Should such questions be closed? That seems to follow the letter of the rule (and I saw one "close" vote on such a question), but it doesn't seem like the best use of the site.
Surely many people have faced a question and had no idea where to begin. It's certainly happened to me! I think this may be especially common when people are getting used to the idea of having to formally prove things.