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Inverse View
It is not the case that A sentence like '2+2=4' can be fully explained by its role in inferential practice without positing abstract objects as referents.
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Reasons For
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Reason for
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1.
Inferential roles alone cannot explain why '2+2=4' is necessarily true while '2+2=5' is necessarily false without positing objective facts.
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2.
Different formal systems have different inference rules; without abstract mathematical objects, it's unclear which system is 'correct.'
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3.
Inferential practices themselves require grounding: why do these particular rules rather than others constitute valid mathematical practice?
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Reasons Against
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Reason against
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1.
Mathematical truths remain stable and useful across all contexts where we apply inferential rules, requiring no appeal to abstract objects.
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2.
Positing abstract objects creates epistemological problems: how do finite minds access causally inert entities outside space and time?
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3.
Inferential role semantics successfully explains why '2+2=4' is valid—its meaning derives from its relationships within a formal system.
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