Independent inquiries have been converging on the present account from their own directions ([§2.9](<2.9 Precedent Convergence.md>)). That convergence is no coincidence, and the reason it is not lies in [§2.6.11](<2.6.11 No Fourth Condition.md>).

Condition-Individuation supplies a two-clause screen for Condition-status (determinacy plus LEM along an existence-axis, and irreducibility). It shows that T, S, and Φ pass the screen and places a precise burden on any proposed fourth; as clarified in [§2.6.11](<2.6.11 No Fourth Condition.md>), entailment by the three does not alone prove reducibility, so the screen does not deductively establish that no further irreducible axis is possible. Nor does the screen by itself generate three consequence relations. What it motivates is three axis-specific formal disciplines: temporal logic native to T, spatial logic native to S, and the substantial-logic umbrella native to Φ. Their formal differentiation comes from the operators, axioms, and semantics required by each axis's upstream structure, together with the independently developed literatures of Prior, Tarski, Leśniewski, Quine, Simons, Lowe, and others. The clustering is downstream confirmation, not a proof extracted from LEM alone.

The Triunity of Nature ([§2.6.9](<2.6.9 Triunity of Nature.md>)) carries three logics native to its three Conditions. Physics is empirical-nomological work conducted within the joint apparatus of those three, the *modal structure*: the fixed structure of what is and is not possible that □(T∧S∧Φ) defines. Metaphysics is the root-layer discipline that articulates the logics' grounding in Reality's structure. The convergence happens because the three Conditions are real, the disciplines tracking them are the formal logics native to each, and those three logics jointly constitute one modal structure.

The modal structure established here is structural (what any possible Reality must instantiate to be a Reality) not a phenomenal explanation. Whether consciousness fits this structure is the question of [§4.3.1](<4.3.1 The Hard Problem of Consciousness.md>) and Chapter 8, not of Chapter 2.

Chapter 3 then tests the framework on the terms set at the close of [§2.9](<2.9 Precedent Convergence.md>), recording where its independent lines genuinely separate and where they share the role-level identifications established here.[^2-10-0-three-logical-strata-ch4]

[^2-10-0-three-logical-strata-ch4]: [§4.1.8](<4.1.8 Metaontological Deflationism.md>) engages ontological deflationism and [§4.1.9](<4.1.9 Wittgensteinian Quietism.md>) takes up Wittgensteinian quietism, the Chapter 4 meta-philosophical objections to the framework's commitments; [§4.3.9](<4.3.9 Structural Realism.md>) handles structural realism, the structural-realist alternative engaging the metaphysical-structuralist commitments.


- [2.10.1 Three Distinct Logics](<2.10.1 Three Distinct Logics.md>)
- [2.10.2 The Stratified Architecture](<2.10.2 The Stratified Architecture.md>)
- [2.10.3 The Metalogical Position](<2.10.3 The Metalogical Position.md>)


---

← [2.9.5 Three Formal Logics](<2.9.5 Three Formal Logics.md>) | [2.10.1 Three Distinct Logics](<2.10.1 Three Distinct Logics.md>) →
