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Inverse View
It is not the case that Feferman's own analysis of predicativity shows that any ordinal recognition procedure relies on prior comprehension principles not internal to the progression.
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Reasons For
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Reason for
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1.
Feferman's own formal work shows ordinal notations can be inductively defined without external appeals; the progression is mathematically self-contained.
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2.
Calling comprehension principles 'external' conflates the metatheory with the object theory; internal coherence doesn't require complete self-sufficiency.
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3.
Many ordinal recognition procedures in constructive mathematics succeed through recursive verification, not prior abstract comprehension assumptions.
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Reasons Against
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Reason against
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1.
Feferman's autonomous progression of ordinals requires external criteria to validate each step, which cannot be self-justifying within the system.
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2.
Predicative definitions must avoid impredicative circularity, necessitating foundational comprehension principles that transcend the ordinal hierarchy itself.
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3.
The very notion of 'recognizing' an ordinal as admissible presupposes conceptual resources not generated by prior stages of the progression.
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