In a message dated 7/25/2006 11:08:02 P.M. Eastern Standard Time,  
[EMAIL PROTECTED] writes:

My  point, though, was simply that at that point they would clearly no
longer  be human.... they would be something else, by  definition.



One of the problems with your mode is thinking is the "by definition" part.  
This is way we used to think about species before Darwin. They were thought of 
 as having some essential essence unique to them. However we now we define  
species in a variety of functional ways. The definition I gave (interbreding  
populations) was developed by Dobninsky and Mahr. (ok I probably spelled these  
names wrong). Whatever definition one uses species are real but they are 
natural  things with blurry margins not philosophical things (with distinct 
essences). So  the something else that HeLA cells would be would still be human 
in 
some ways  and maybe not human in others. In some circumstances they would be 
separate  species and in other circumstances they would not be.
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