<p>To add to Tim's answer: according to how you've described it, your second example should be closed as too broad (cf <a href="https://stats.meta.stackexchange.com/a/3181/17230">Top k List of Reasons to Close a Question Immediately</a>). And it's not germane whether it's for work, study, or fun. </p>

<p>These kind of questions differ from self-study ones (exercises, book-work) in that it's only for the latter that it's even possible to give a complete solution within the confines of a CV answer. So <a href="https://stats.meta.stackexchange.com/a/5292/17230">@ReneBT's proposal</a>, rather than imposing a restriction, would in fact be a mechanism for enabling the sort of broad, unfocused, forum-style question that we currently close.</p>
