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Inverse View
It is not the case that The operation T on ordinal numbers can be defined in NFU
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Reasons For
2 perspectives
Reason for 1 of 2
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1.
NFU's stratification requirements impose type-level constraints that block naive application of T to its own ordinal representatives.
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2.
The operation T as classically defined requires quantification over all ordinals at a single type level, which violates NFU's stratification.
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Reason for 2 of 2
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1.
Isomorphism types in NFU are sets of relations of a given type-level, making cross-level ordinal operations like T type-theoretically ill-formed.
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2.
Holmes's own reconstruction of T in NFU requires auxiliary lemmas about type-raising that are not part of the original classical definition, making the claim equivocal.
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Reasons Against
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Reason against
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1.
Ordinals in NFU are isomorphism types of relations
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2.
The operation T is definable on isomorphism types of relations
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