Lots of tweaks that make the what/which+noun questions all work

A variety of little things that make questions like this work:

"Which girl do you like?" "What book are you reading?"

NB: which+noun had been previously classified as a _quantity() relation; I changed that to a _det() relation, which makes more sense and is the standard grammatical classification -- they are question-word-determiners.

P.S. Also corrected a few ancient typos that I noticed, so I don't know if those might affect something someday . . .
Oh, I see.  That's because exclusion is applied per "path" of the Feature Structure, to allow exclusive rules to be applied to different part of the sentence (eg.  both SVO and SV rules need to be applied for the sentence "She flew and she ate an apple." even though they are exclusive)

I can't think of a way around this, so I guess your solution is OK.