16.8. The problem of any

Consider the English sentence

Example 16.47. 

Anyone who goes to the store, walks across the field.

Using the facilities already discussed, a plausible translation might be

Example 16.48. 

ro da poi klama le zarci cu cadzu le foldi
All X such-that-it goes-to the store walks-on the field.

Everyone who goes to the store walks across the field.

But there is a subtle difference between Example 16.47 and Example 16.48. Example 16.48 tells us that, in fact, there are people who go to the store, and that they walk across the field. A sumti of the type ro da poi klama requires that there are things which klama: Lojban universal claims always imply the corresponding existential claims as well. Example 16.47, on the other hand, does not require that there are any people who go to the store: it simply states, conditionally, that if there is anyone who goes to the store, he or she walks across the field as well. This conditional form mirrors the true Lojban translation of Example 16.47:

Example 16.49. 

ro da zo'u da go klama le zarci
For-every X : X if-and-only-if it-is-a-goer-to the store
gi cadzu le foldi
is-a-walker-on the field.

Although Example 16.49 is a universal claim as well, its universality only implies that there are objects of some sort or another in the universe of discourse. Because the claim is conditional, nothing is implied about the existence of goers-to-the-store or of walkers-on-the-field, merely that any entity which is one is also the other.

There is another use of any in English that is not universal but existential. Consider

Example 16.50. 

I need any box that is bigger than this one.

Example 16.50 does not at all mean that I need every box bigger than this one, for indeed I do not; I require only one box. But the naive translation

Example 16.51. 

mi nitcu da poi tanxe gi'e bramau ti
I need some-X which is-a-box and is-bigger-than this-one

does not work either, because it asserts that there really is such a box, as the prenex paraphrase demonstrates:

Example 16.52. 

da poi tanxe gi'e bramau ti zo'u mi nitcu da
There-is-an-X which is-a-box and is-bigger-than this : I need X.

What to do? Well, the x2 place of nitcu can be filled with an event as well as an object, and in fact Example 16.51 can also be paraphrased as:

Example 16.53. 

mi nitcu lo nu mi ponse lo tanxe
I need an event-of I possess some box(es)
poi bramau ti
which-are bigger-than this-one.

Rewritten using variables, Example 16.53 becomes

Example 16.54. 

mi nitcu lo nu da zo'u
I need an event-of there-being-an-X such-that:
da se ponse mi
X is-possessed-by me
gi'e tanxe gi'e bramau ti
and is-a-box and is-bigger-than this-thing.

So we see that a prenex can be attached to a bridi that is within a sentence. By default, a variable always behaves as if it is bound in the prenex which (notionally) is attached to the smallest enclosing bridi, and its scope does not extend beyond that bridi. However, the variable may be placed in an outer prenex explicitly:

Example 16.55. 

da poi tanxe gi'e bramau ti zo'u
There-is-an-X which is-a-box and is-bigger-than this-one such-that:
mi nitcu le nu mi ponse da
I need the event-of my possessing X.

But what are the implications of Example 16.53 and Example 16.55? The main difference is that in Example 16.55, the da is said to exist in the real world of the outer bridi; but in Example 16.53, the existence is only within the inner bridi, which is a mere event that need not necessarily come to pass. So Example 16.55 means

Example 16.56. 

There's a box, bigger than this one, that I need

which is what Example 16.52 says, whereas Example 16.53 turns out to be an effective translation of our original Example 16.47. So uses of any that aren't universal end up being reflected by variables bound in the prenex of a subordinate bridi.