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Re: [lojban] unquantified sumti with restrictive relative clauses in xorlo



la'o me. Martin Bays .me cusku
Recall the following production:

sumti5 <- quantifier? sumti6 [relative-clauses]

I want to understand the semantics of this in the case that there is no
quantifier, and there is a restrictive clause among the relative clauses.
{ko'a poi broda}, in other words.
[...]
I can see six broad approaches to interpreting such expressions, i.e. those of
the form {ko'a poi broda}.

(i) Consider it an error, or just ignore any restrictives.

I don't like this option, because it would be an exception. I believe {poi} can be defined in such a way that the same rule handles both quantified and unquantified sumti.

(ii) Declare that in this case (and this case alone), there is an implicit
     quantifier after all.

This is certainly how if feels at times, but it's probably not necessary for it to actually be the case at a formal level.

By the way, the case of {lo broda poi brode ku'o ku} needs to be looked at as well. An outer quantifier wouldn't affect the {poi} clause here, but it still needs to be defined what it means and how it differs from {noi}.

(iii) Have it pick out some referents such that they satisfy the restrictives:
     ko'a poi broda -> zo'e noi me ko'a gi'e broda

This is pretty much my take on it. I like the general definition of {poi broda} == {je poi'i* broda} because it works in all cases, both with sumti and with selbri, and it doesn't matter if there are quantifiers present. (it is equivalent to your definition, but works better in real life as an afterthought, not that that's very relevant here)

(iv) Have it pick out those referents which each satisfy broda:
     ko'a poi broda ->
         zo'e noi ro da zo'u go da me ke'a go ge da me ko'a gi broda

I think this doesn't fit with the current system where the argument places of predicates aren't defined as distributive or collective (they should be in my opinion).

If you want distributive satisfaction, {ko'a poi ro ke'a broda} works.

(v) Something along the lines of (iv), but more in line with plural logic /
     mereology, perhaps by requiring the obvious maximality condition, i.e.
     ko'a poi broda ->
         zo'e noi ge ge me ko'a gi broda gi ro da poi ge ge ke'a xi re me ke'a gi
         ke'a me ko'a gi ke'a broda cu du ke'a
     , perhaps making it an error if there is no unique such maximum, or
     perhaps taking all the maxima together (i.e. taking the join).

This is also a bit too specific, like (iv).

(vi) Something along the lines of (v), but with no formal rule - just an idea
     that the intended referents of {ko'a poi broda} are picked out among the
     referents of {ko'a} by virtue of their brodaing.

Isn't this similar to (iii) as well?

The usage I've seen could fit any of (iii)-(vi), I think. So, taking various
degrees of liberty, could CLL's use of restrictives - although of course they
had implicit quantifiers, so are not really relevant.

There is definitely a lot of contrasting usage between {ko'a poi} and {ko'a noi}, with meaningful distinctions being felt by the speakers. That, and the fact that I think the general definition of {poi} in terms of {je} (or gi'e) works made me believe that something like (iii) is the most practical solution.

We could try to write up a table of all the cases:

ko'a poi broda	
	lo me ko'a je poi'i broda / zo'e noi me ko'a gi'e broda

PA ko'a poi broda
	PA me ko'a je poi'i broda / PA da poi me ko'a gi'e broda

ko'a noi broda
	ko'a (to ri broda toi)

PA ko'a noi broda
	PA ko'a (to ri broda toi)

lo broda poi brode
	lo broda je poi'i broda / zo'e noi broda gi'e brode

lo broda noi brode
	lo broda noi brode / zo'e noi broda (to ri brode toi)

(and {lo broda ku NOI} are the same as {ko'a NOI}, as noted)

lo PA broda poi brode
	lo PA broda je poi'i brode
	zo'e noi broda gi'e brode gi'e PA mei

lo PA broda noi brode
	lo PA broda (to ri brode toi)

So a lot of these are equivalent as long as no quantifier is added, but they all use the same expansions which work whether or not there is a quantifier (or so I hope, let's look for mistakes!).

Oh, there is also {PA broda NOI}:

PA broda poi brode
	PA broda je poi'i brode / PA da poi ke'a broda gi'e brode

PA broda noi brode
	PA da (to ri broda toi) poi ke'a broda

Some of this depends on {ri}'s ability to repeat {da} and quantified terms. Writing {PA da (to da broda toi)} would be weird, as the {da} could just as well be a new variable.

Anyway, my general idea here was to attach {poi} directly to the selbri when possible (using {je poi'i}). When that doesn't work, the sumti needs to be turned into a selbri, but with quantified terms that is already part of xorlo's definition (PA ko'a == PA me ko'a).

mi'e la selpa'i mu'o

--
* {poi'i} (http://jbovlaste.lojban.org/dict/poi%27i) is an old idea which has gained some popularity more recently. I personally consider it a great cmavo with a lot of utility and have suggested giving it a normal cmavo form (*cough*voi*cough*)

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