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Date: Fri, 23 Dec 2011 14:49:26 -0800
From: Robin Lee Powell <rlpowell@digitalkingdom.org>
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Cc: bpfk@lojban.org
Subject: Re: [bpfk] Can we drop the fore tanru cmavo?
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On Fri, Dec 23, 2011 at 01:25:46PM -0500, John Cowan wrote:
> Robin Lee Powell scripsit:
> 
> > i.e., can PEG support having one set of fore logical connectives
> > only, or is the issue deeper than lookahead?
> 
> In principle it is only lookahead, but I'd be reluctant to mess
> with this because of human limitations -- PEG grammars can look
> ahead arbitrarily far, but humans cannot.  When you hear GA after
> a selbri, you know that the selbri is complete; when you hear
> GUhA, you know there is more selbri to come.  I think that's a
> valuable property that shouldn't be discarded lightly.
> 
> This is why I have been reluctant to use the PEG grammar as a
> basis for grammar changes.  The YACC grammar is over-constraining
> and makes some elidable terminators necessary (the notorious le
> broda ku joi le brodo) that wouldn't actually confuse anyone.  But
> OTOH it doesn't permit things to be grammatical that no human
> could decipher.  We need a happy medium.

I completely agree.

-Robin

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