Re: [ontolog-forum] language vs logic - ambiguity and startingwithdefini

[Pavithra <pavithra_kenjige@xxxxxxxxx>]

Here is a Paper on
Guide to Expressing Facts in a First-Order Language

http://cs.nyu.edu/courses/spring06/G22.2560-001/folguide.pdf

By Earnest Davis..



--- On Tue, 9/21/10, Christopher Menzel <cmenzel@xxxxxxxx> wrote:

From: Christopher Menzel <cmenzel@xxxxxxxx>
Subject: Re: [ontolog-forum] language vs logic - ambiguity and startingwithdefinitions
To: "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx>
Date: Tuesday, September 21, 2010, 2:00 PM

On 9/21/2010 12:05 AM, Alex Shkotin wrote:

Hi Pavithra,

it seems we should consider separately:
- First order language - simple context free language

First-order languages are not necessarily context free.  For instance, some first-order languages don't allow vacuous quantification; checking for this requires a lookahead that makes the language context sensitive.

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