Reflexive self-constitution is the overarching move of the derivation: a structure that builds itself through its own activity. The derivation does not begin with a framework and fill it in. It begins with the impossibility of nothing, and each step produces structure that then requires further structure, until the whole system is a fixed point of its own construction.
This is not circular reasoning. Circularity would mean assuming the conclusion. Reflexive self-constitution means that the derivation’s output, when subjected to its own logic, generates nothing new — it regenerates itself. The structure is self-grounding not by assumption but by demonstrable self-reproduction.
The pattern appears at three scales:
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Unit level (steps 1—5): the relational unit sustains itself (Closure), marks its own boundary (Boundary), and folds that boundary into itself (Reflexive form).
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Field level (steps 6—9): multiple units cohere into a field (Field form), the field acquires a meta-boundary, and folds it in — recapitulating the unit’s journey at a higher level.
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Grand level (step 18): Profiles reconstruct the full tower. The full tower produces Profiles. The derivation, applied to itself, yields itself.
Mathematically, reflexive self-constitution corresponds to the self-containment theorem: — the structure is a fixed point of its own reflexive construction. See The Modal Structure, Theorem 6.2.