So Below: Empirical Exploration of the Universal Imscriptive Grammar

We introduce the Universal Imscriptive Grammar (Universal Imscriptive Grammar): a twelve-primitive structural grammar assigning any system a coordinate in a discrete space of 17,280,000 structural types — the Crystal of Types. Induced from the scientific literature as the minimal shared properties of recognition events, the twelve primitives are independently confirmed by a companion categorical derivation (As Above). The derivations are Frobenius duals (𝜇 ∘ 𝛿 = id): this paper is the 𝜇 half. A central theorem establishes Frobenius non-synthesizability: 𐑹 cannot arise from composition of sub-Frobenius components. The grammar encodes itself at address 6,734,591 in the 𝑂∞ tier of the Crystal it derives. Validated across 3,578 imscribed systems: the inflationary epoch and high-dose 5-MeO-DMT dissolution imscribe to identical tuples (𝑑 = 0.000); the Riemann Hypothesis is a completeness question about 𐑹 on the critical line; a two-gate consciousness score predicts 𝐶 = 0.677 for magnetars, 𝐶 = 0 for black holes and white dwarfs; the Liar paradox requires 𝑃 = 𐑹 — dialetheia is structurally necessary. The full catalog is released as open-source software.