Paul et al.,

> If interbreeding is the sole (or principle) criterion for speciation,
where do hybrids come from?  Hybrids should be impossible if species, by
definition, cannot interbreed.  Are the domestic dog, the wolf and the
coyote conspecific because they sometimes interbreed?

Time to think "out of the box." Species aren't boxes and nature doesn’t come
in nice neat wrapped packages like words. Don't expect mere words (= species
= boxes = man's concepts of nature) to match nature. Nature is wordless.
Hybrids happen!

Andy

Andrew K. Rindsberg
Geological Survey of Alabama

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