Assume population x differs from population y by characteristic z. One group of scholars argues that x and y belong to the same class and that z is incidental and irrelevant to the classification. Another group takes the opposite view: that x and y belong to distinct classes because of z. Is there a way to decide between these two positions?

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    Does such a classification serve some other purpose? – user35066 Apr 19 at 16:04
  • If there's a distinguishing feature it can be used to classify. I can't see how any such classification could be invalid, even though it might be more distracting than useful. – curiousdannii Apr 19 at 22:05
  • No, there is nothing to resolve. Without extra criteria, like a purpose, they are just talking about two different classifications that may both be useful for different purposes. – Conifold Apr 20 at 0:09

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