Chapter 5: The Layer Template

The Canonical Ladder Theorem guarantees that the self-enrichment of Category τ produces exactly four layers E₀, E₁, E₂, E₃. But why does every layer look the same from the inside? This chapter answers the question by identifying a uniform four-component template E_k = (Carrier_k, Predicate_k, Decoder_k, Invariant_k) inherited from the ABCD decomposition. We instantiate it for all four layers, giving the definitive reference for how mathematics, physics, computation, and metaphysics are structured by the same four-fold pattern.