Builds a small set of divergent, equally plausible futures on the two most consequential uncertainties — the Shell/GBN 2×2 scenario method — and stress-tests a strategy against every one of them, ending with robust moves and signposts to watch. Use when the horizon is 3–10 years and a single forecast would be false precision — "scenario planning for this market", "what are the plausible futures for X by 2030?", "build 2x2 scenarios", "alternative futures for the sector". Not for one dated prediction about a single trend (use `foresight`) or for a macro-factor inventory on its own (use `steep-pestle-analysis`).
