Warp wrote:
>   The offspring must be fertile. Ligers and tigons aren't.

How often do they have to be fertile for it to count. If 10% of the 
offspring are viable, is that enough? 1%?

Also, there are some tree species[*] C that's a cross between species A and 
species B. It won't fruit except in the presence of A or B. I.e., the 
offspring are fertile with their parents, but not with each other. Does that 
count?

And, has been mentioned, men are not the same species as other men, so it's 
difficult to understand exactly how to apply this definition to individuals.


[*] I thought it was tangelos, but wikipedia doesn't mention that on their page.

-- 
Darren New, San Diego CA, USA (PST)
   Serving Suggestion:
     "Don't serve this any more. It's awful."

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