The Principle of Consistency of Measurement

The principle of consistency of measurement says that the speed on your speedometer and the speed indicated on the radar gun will be the same. If that weren't true, then there wouldn't really be such a thing as measurement in the way we normally conceptualize it. And again, conversely, if it wasn't true, the situation might be rescuable by a new conception of measurement. It would be a change in our philosophical framework of what science is and so on. We think that the world in fact obeys the principle of inconsistency of measurement.