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Inverse View
It is not the case that Natural kinds should be understood as kinds that support induction and explanation, where generalisations need not be exceptionless.
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Reasons For
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Reason for 1 of 2
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1.
Natural kinds require homeostatic property clusters or essential microstructural properties, not merely inductive utility (Boyd, Ellis).
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2.
A kind defined solely by inductive success conflates epistemic convenience with ontological category membership.
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3.
Scientific generalizations about non-natural groupings (e.g., 'jade') can support induction, proving inductive utility insufficient for natural kindhood.
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Reason for 2 of 2
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1.
Allowing exception-laden generalizations to define natural kinds collapses the distinction between natural kinds and mere nominal or conventional kinds (Kripke, Putnam).
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2.
If exceptionless laws are not required, there is no principled criterion to exclude gerrymandered predicates like Goodman's 'grue' from constituting natural kinds.
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Reasons Against
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Reason against
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1.
Natural kinds are identified by their role in supporting induction and explanation.
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2.
Generalisations in inductive and explanatory processes can have exceptions and still be scientifically valid.
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