This is a new instance of Email Interactive, and does not exist in practice yet.
This is not necessarily a joke with several possible punch lines. It can be a controversial topic (I don't think I'll be doing this, but if I did, it would fit this category), or a question of pure opinion (not necessarily controversial), or anything else where I give the input, and could recieve several outputs (entering programming jargon).
No matter how obvious the reason for your output is, you must explain it. I will decide if the explanation/answer is worthy enough, and publish it if so. If there is no explanation, I will not publish your output.