This cluster is different. These objections do not try to escape the structure; they grant it and ask whether it is rich enough. Can mere structure accommodate conscious experience, intrinsic nature beneath relations, or the uncanny fit between mathematics and the world?

Because these challenges come from inside the picture, they cannot be met by the earlier reply that a rival merely relocates structure. The diagnostic shifts. Where §[§4.1](<4.1 Modal and Semantic Foundations.md>)–4.2 test accounts that claim to avoid the structure, this cluster tests whether the account can answer genuine questions from within.


- [4.3.1 The Hard Problem of Consciousness](<4.3.1 The Hard Problem of Consciousness.md>)
- [4.3.2 Eliminativism and Illusionism](<4.3.2 Eliminativism and Illusionism.md>)
- [4.3.3 Russellian Monism](<4.3.3 Russellian Monism.md>)
- [4.3.4 Cosmopsychism](<4.3.4 Cosmopsychism.md>)
- [4.3.5 Idealism](<4.3.5 Idealism.md>)
- [4.3.6 The Unreasonable Effectiveness of Mathematics](<4.3.6 The Unreasonable Effectiveness of Mathematics.md>)
- [4.3.7 Mathematical Universe Hypothesis](<4.3.7 Mathematical Universe Hypothesis.md>)
- [4.3.8 Non-Locality, Branching, and the Particle Concept](<4.3.8 Non-Locality, Branching, and the Particle Concept.md>)
- [4.3.9 Structural Realism](<4.3.9 Structural Realism.md>)
- [4.3.10 Bundle and Trope Theory](<4.3.10 Bundle and Trope Theory.md>)
- [4.3.11 Mereological Nihilism](<4.3.11 Mereological Nihilism.md>)
- [4.3.12 Haecceitism](<4.3.12 Haecceitism.md>)


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← [4.2.9 Existential Inertia](<4.2.9 Existential Inertia.md>) | [4.3.1 The Hard Problem of Consciousness](<4.3.1 The Hard Problem of Consciousness.md>) →
