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Re: Archaeopteryx

In a message dated 6/16/03 5:40:09 AM Pacific Daylight Time, oak@uniserve.com 

<< What's a class, in quantifiable, testable terms? >>

A class is one formally named subset of a partition of a phylum into two or 
more subsets. Test: Are the group name and composition easily remembered by 
enough workers to be useful in scientific discourse?