[lit-ideas] Query about Logic
- From: Eric Yost <mr.eric.yost@xxxxxxxxx>
- To: lit-ideas@xxxxxxxxxxxxx
- Date: Thu, 14 Jan 2010 15:03:01 -0500
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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