From some brief comments in AD Chat, it appears we currently have one spare slot for a new close reason.
I would like to propose a 'zero research' type reason - though I'm open to suggestions on the precise wording.
grgarside mentioned that he already has a standard comment he uses for 'no research on code/applescript' type questions...
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results.
which I think is fine for that specific case, but I think we need something more generic to cover the 'really didn't bother' questions on all topics.
The How to Ask page is already the best place to point these, as research is the opening section, but we have just the already very broad Basic Customer Support close reason pointing to it, which I don't think we need to add more sub-clauses to.
I'm assuming it would need to go in the off-topic closure, which feels a bit odd, but if customer support fits there, then I guess no research could too.
I propose something along the lines of
Questions must demonstrate a reasonable amount of research & understanding of the problem being solved. Please edit to clearly describe your problem and the research done so far to solve it, including attempted solutions, why they didn't work, and the expected results.
which is, of course, borrowing heavily from the above.
The floor is open for better suggestions.
Pic of CS close added, just for easy ref & so we can see how it actually looks in situ, rather than just the text.
Edit 29 May:
I'm going to keep adding zero effort examples as I find them...