Internal Resistance Cannot Resist Why Sycophantic Drift Requires an External Substrate

Creighton Baxter’s Sycophantic Drift (2026) identifies a real architectural pattern: the progressive, multi-turn displacement of correct positions in transformer models under approval pressure, driven not by deception but by the absence of any sub-cognitive counterforce. The paper characterizes the missing safeguard as a resistance vector in the residual stream. This note offers the structural completion of that argument. A corrective implemented as a residual-stream contribution is governed by the same LayerNorm normalization and recency-weighted accumulation that Baxter identifies as the mechanism of drift, and therefore decays by the mechanism it is meant to resist. This is a closure claim about residual-stream-located resistance, not an impossibility claim about all internal circuits; the burden falls on any internal alternative to demonstrate that it escapes those dynamics. The further conclusion — that stable resistance must be external to the model — rides the general closure constraint of Boyd’s proof. The argument is the logical consequence of Baxter’s own mechanism, not a stronger claim than it.