Yeah, I thought for about 15 seconds before choosing that date, but then decided it wasn't too important. Perhaps the better way to express it is, 'when did we

Yeah, I thought for about 15 seconds before choosing that date, but then decided it wasn't too important. Perhaps the better way to express it is, 'when did we not have the wrong physics'? When did we jettison alchemy and the rest forever in favor of modern science? I'd guess earlier than 1900, but I don't know. And of course, there are many gray areas.