Re: [lojban] Lessons

[Edward Cherlin <edward.cherlin.sy.67@aya.yale.edu>]

At 11:30 PM -0400 5/24/01, Rob Speer wrote:
> On Fri, May 25, 2001 at 03:06:08AM +0000, Jorge Llambias wrote:
> >  la robyspir cusku di'e
>
> Crap. I really do need a 'y' in there, don't I. Or at least a pause. (Although
> I was spelling it 'rabspir'.)
>
> >  >     ganai ti solji gi mi ba citka le mi mapku
> >  >     "If this is made of gold, then I will eat my hat."
> >
> >  Compare with:
> >
> >        "If this were made of gold, then I would eat my hat."
> >
> >  Assuming "this" is not made of gold, I have no problem asserting
> >  the first sentence, but I certainly don't want to assert the
> >  second one. They can't both be translated by the same Lojban
> >  sentence.
>
> Okay, then we're essentially in agreement. ganai...gi and go...gi are
> legitimate ways of saying if...then as long as you're not basing it on a
> situation that is likely to be untrue. That part is what requires the
> 'subjunctive'.
>
> So... do we need a new tense for this? Perhaps use a couple of 'x' cmavo to
> express "in another universe" or "in all possible universes" and one to return
> to the universe of what we believe to be true?

That isn't the solution. "If wishes were horses, then beggars would 
ride." "If your grandmother had wheels, she would be a trolley car." 
In both cases, it is *essential* to the rhetorical point that the 
condition is not only counterfactual but impossible. The logic in the 
first case is

Impossible hypothetical: Wishes are horses.
Fact: In real life, beggars are poor, and cannot own horses.
Fact: Beggars naturally have plenty of wishes.
Conclusion: Poor beggar makes wish, wish is horse, beggar gets on and 
rides off in all directions.

As I said, this is rhetoric, not logic. This is the case in question, anyway.

The second case is quite different, but still purely rhetorical. It 
is used as a retort to a conditional where the condition cannot be 
fulfilled. The ordinary logical connective is quite appropriate here, 
since the point is that a false premise implies anything. This case 
turns out to be simple, but we have to be clear on it and not confuse 
it with the other.

> --
> la rab.spir
>
>
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--

Edward Cherlin
Generalist
"A knot!" exclaimed Alice. "Oh, do let me help to undo it."
Alice in Wonderland