The Hard Problem Is Not a Bridge Between Two Substances, But the Formation of Internality: Structural Preconditions of Consciousness in Difference Monism

This paper reformulates the hard problem of consciousness within the framework of Difference Monism (DM). Rather than asking how physical processes bridge to subjective experience, it asks: what kind of structure develops internality sufficient to host consciousness? The paper identifies four threshold conditions (stable boundary, internal differentiability, folded-back inheritance, subject-level integration), distinguishes DM from IIT/GNW/illusionism, and establishes a falsifiable negative boundary claim: complete third-person translation cannot residuelessly substitute first-person access. English preprint.