[lit-ideas] Re: Query about Logic

  • From: Julie Krueger <juliereneb@xxxxxxxxx>
  • To: lit-ideas@xxxxxxxxxxxxx
  • Date: Thu, 14 Jan 2010 14:34:53 -0600

Now you know why I prefer dogs.

Isn't the "sometimes" rather implied, in that nothing is in a perpetual or
static state/  All humans must eat; this is a human, it eats, does not imply
that it is eating every second of the time.  Or that if the creature in
question is not eating at the moment it is therefore not human.  Or does

There's got to be a symbolic logic answer out there -- where's Speranza?

Julie Krueger

On Thu, Jan 14, 2010 at 2:03 PM, Eric Yost <mr.eric.yost@xxxxxxxxx> wrote:

>    All cats  purr
>>   This is a cat
> How do logicians deal with the durational aspects of an attribute? Cats do
> not purr all the time, so aren't qualifiers necessary?
> e.g.
> All cats purr sometimes
> This is a cat
> This cat purrs sometimes
> OR
> Male kittens become male cats gradually
> Un-neutered male cats spray
> This is a male kitten which will not be neutered
> Eventually this kitten will become a cat and spray
> EY
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