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To: Aquinasfan
I'm using "form" in the Aristotelian sense, as "substance" or "essence," not shape.

Well, then, you're using a definition that has no relevance to the question. Obviously, it is measurable physical properties (i.e. ability to interbreed) rather than philosophical abstractions that define a biological species.

22 posted on 12/08/2005 11:03:56 AM PST by steve-b (A desire not to butt into other people's business is eighty percent of all human wisdom)
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To: steve-b
Obviously, it is measurable physical properties (i.e. ability to interbreed) rather than philosophical abstractions that define a biological species.

So then new species arise very abruptly, as per the theory of punctuated equilibria?

I'm also curious to know how children can recognize various determinate species of animals when they know nothing of interbreeding, or even breeding.

23 posted on 12/08/2005 11:10:41 AM PST by Aquinasfan (Isaiah 22:22, Rev 3:7, Mat 16:19)
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To: steve-b
Obviously, it is measurable physical properties (i.e. ability to interbreed) rather than philosophical abstractions that define a biological species.

The ability to interbreed (or lack thereof) is not the definition of species. It is one of a list of criteria.

36 posted on 12/09/2005 5:55:04 AM PST by js1138 (Great is the power of steady misrepresentation.)
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