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[lojban] Question about BO w/mixed logical and non-logical connectives
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- Subject: [lojban] Question about BO w/mixed logical and non-logical connectives
- From: scope845hlang343jbo@icebubble.org
- Date: Wed, 08 Jan 2020 05:46:20 +0000
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coi rodo,
I have a couple of (3) questions about {BO} and how it behaves when it
is used in a sumti containing both logical (A) and non-logical (JOI)
connectives and/or tensed logical connections (A+PU+BO, JOI+PU+BO).
(I thought about posting this to the Lojban Beginners' list, but it
didn't seem like a beginners' question. Feel free to re-/cross-post if
you think that appropriate.)
{le xunre .e le crino .e le blanu .e le xekri .e le blabi} means
"(((the red and the green) and the blue) and the black) and the white",
but {BO} increases connective precedence and reverses associativity, so
{le xunre .e le crino .ebo le blanu .ebo le xekri .e le blabi} means
"(the red and (the green and (the blue and the black))) and the white".
This works with non-logical connectives, too, i.e.:
{le xunre joi le crino joibo le blanu joibo le xekri joi le blabi} means
"(the red with (the green with (the blue with the black))) with the white".
That's how {BO} is supposed to work. But what if your sumti contains
BOTH logical and non-logical connectives? Example:
{le xunre .e le crino .e le blanu joi le xekri .e le blabi}
or even:
{le xunre joibo le crino .ebo le blanu .e le xekri joi le blabi}
So, my questions are:
(1) Are the logical connectives (eks, jeks, etc.) and non-logical
connectives (JOI, BIhI, etc.) treated the same when it comes to
pairing-off connected sumti? Or are, for example, the non-logical
connectives given higher precedence than the logical connectives?
(A higher precedence for non-logical connectives would make it
easier to transform a bridi containing the sumti into
logically-connected bridi containing the non-logically-connected
component sumti.)
(2) Is a {BO} attached to a non-logical connective treated identically
to a {BO} attached to a logical connective? Or does, for example,
a {BO} following {JOI} have higher precedence than a {BO} following
{A}?
Lastly, I am confused about the role of {BO} in tensed logical
connections, those of the form {A+PU+BO} or {JOI+PU+BO}. I.e.,
{le xunre .e le crino .ebabo le blanu .ebabo le xekri .ebo le blabi}
or even:
{le xunre .e le crino .ebabo le blanu joi le xekri joibo le blabi}
So, my third and final question:
(3) Does a {BO} required by a tensed connection {A+PU+BO} or {JOI+PU+BO}
(where the {BO} is NOT optional) have the same effect as a {BO} on
an untensed connective (where {BO}s are discretionary)? Or are
tensed logical connectives treated as being {BO}-less? By my
reading of the grammar, a tensed connection cannot be followed by
two consective {BO}s in a row, i.e. {.apubobo}, to disambiguate the
precedence intended.
Yes, I realize that the pragmatic solution is just to disambiguate any
potentially confusing connections using {KE}..{KEhE} parentheses. But
I'd like to know what the formal rules are for how these different kinds
of connectives interact with each other and with the cmavo {BO}. I
can't find anyplace in the CLL which speaks to this kind of interaction.
Much thanks in bo advance!
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