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Re: a rose by any other name(was fish & dogs)



In a message dated 12/3/00 8:45:34 PM EST, Dinogeorge@aol.com writes:

<< I think it would be a good idea to reject outright any taxa constructed as 
 Boolean-arithmetical combinations of clades that are disconnected. In the 
 above example, Cetacea is disconnected from Pisces by Tetrapoda, so under 
the 
 connectivity rule the group "fish&whales" cannot be a taxon. This is, of 
 course, a dogmatic rule--but a practical one. >>

This rule automatically rejects all polyphyletic taxa, of course.