Although the Heil–Ramanathan–Topiwala conjecture is false in full generality, its failure makes the classification of positive geometric and arithmetic regimes more urgent. We settle the critical mixed-arithmetic regime for four time-frequency shifts. For \(z=(x,ω)\) and \(w=(y,η)\), set \(σ(z,w)=xη-yω\). Let \(u,v\in\R^2\) satisfy \(\lvertσ(u,v)\rvert=1\), write \(ν=αu+βv\), and assume that \(0,u,v,ν\) are distinct. If \(\dim_{\Q}\operatorname{span}_{\Q}\{1,α,β\}=2\) then, for every nonzero \(f\in L^2(\R)\), the vectors \(f,π(u)f,π(v)f,π(ν)f\) are linearly independent. This includes both four-point configurations in Chris Heil's Conjecture 9.2. The proof first converts a putative dependence into a scalar cocycle over an irrational rotation. On a positive-measure family of zero-free fibres, winding and continued-fraction returns force the periodic holonomy to be constant. The return multiplier is Laurent polynomial, however, so its ungauged holonomy is algebraic; the constant-holonomy law simultaneously makes it an irrational character. These conclusions are incompatible. The principal theorem and its complete formal dependency chain have been fully certified end-to-end in Lean 4, including the physical all-nonzero case, the complete three-point HRT theorem, the coefficient-reduction step, and the final four-point conclusion. The accompanying \href{https://www.dropbox.com/scl/fi/jd9xeqqera147wdc82r8k/3f260460-07d5-45f5-8d1c-ee1d2879c0af-aristotle-32-.tar.gz?rlkey=a24njadfds5ty9ez473lk03lv&e=1&dl=0} {Lean 4 certification archive} contains reproducible source, pinned build instructions, and transitive axiom audits.