Re: Speciies? you gotta be kidding.
If we lined up 1,000,000 baseball players according to ability, you wouldn't be able to tell the difference in skill between any two people standing next to each other, no matter how hard you watched them practice or play. But that doesn't mean #847,843 has a prayer of hitting #71's curveball.
There's obvious reasons for creating a taxonomy of living things, and grouping together organisms that can reproduce is a sensible category that makes a meaningful distinction.
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