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Re: [lojban] Revising mu'ei and CAhA once again. Possible worlds.





On Tuesday, August 7, 2012 6:20:01 AM UTC+4, clifford wrote:
I've lost something here, I think.  'mu'ei' doesn't say anything about any particular bag, only about the universe of bags (if I am right of thinking of bags as worlds).  So to say it is possible that a ball selected from a selected sack in that universe is black doesn't get beyond saying that some balls in some bags are black.  If we get to a particular bag, saying that a selected ball might be black merely means that some balls in that bag are black, but this is no longer a modal claim (as the other might well not be, if the supply of bags is fixed.  (If the bags are not the worlds, then I don't follow what is going on, if itis meant to be about possible worlds.)
Bag is a set of possible worlds. One ball is one possible world. Bag is present at A-level only.
When you extract one ball (and you can extract one ball only) it becomes This World with no alternatives.
I agree that mu'ei describe A-level and that mu'ei is more precise due to implementing PA.


From: Jorge Llambías <jjllambias@gmail.com>
To: lojban@googlegroups.com
Sent: Monday, August 6, 2012 5:34 PM
Subject: Re: [lojban] Revising mu'ei and CAhA once again. Possible worlds.

On Mon, Aug 6, 2012 at 9:44 AM, Gleki Arxokuna
<gleki.is.my.name@gmail.com> wrote:
>
> OK. If no other criticism I'll correct it and post it to lojban.org wiki.

Strictly speaking, "ka'e" only says that the bag contains black balls.
It doesn't say whether it also contains white balls or not, although
pragmatically one expects that it will, just as when someone says
"some" one pragmatically expects "but not all" to be true as well.

Similarly "ka'e na" would say that the bag contains white ball, saying
nothing about whether it contains black ones as well.

In order to say that it contains both black and white balls you may
need something like "su'opame'iro mu'ei", "in some but not all
worlds". "May or may not", as opposed to just "may".

I'd put "bi'ai" at the same level as "ka'e", it's not really about
materialization. That the ball picked is black is just a consequence
of all of them being black in that bag, so of course the one that
materializes will be as well, but "bi'ai" has nothing to do with the
materialization itself. Similarly it's not all that relevant to "na
ka'e" that the ball picked is white, it's just a consequence of all of
them being white in that bag.

> Are there still other voices for mu'ei?

"mu'ei" allows a more fine grained description of the contents of the
bags, "so'u mu'ei", "so'o mu'ei", "so'i mu'ei", "so'e mu'ei", "so'a
mu'ei", "du'e mu'ei", "rau mu'ei", "mo'a mu'ei".

mu'o mi'e xorxes

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