ok, I understand the problem with the sentence of the aforementioned example.

So, lets put it aside, and examine another example.

If the context was already clear, i.e. we're talking about ships, could we write {nuq DIHIv ?} for "which ships will we attack ?" ?

The question really is, should you treat a question pronoun that is known to have a plural answer as if it is plural or singular? Unfortunately, I'm pretty sure Okrand has never used nuq in a sentence in which the answer was known to be plural, so we can't tell what the solution is.

-- 
SuStel
http://trimboli.name