Or that the equation was built to fit those characteristics. At first I looked at the things and thought: "So what it doesn't provide any insights". Then read

Or that the equation was built to fit those characteristics. At first I looked at the things and thought: "So what it doesn't provide any insights". Then read on and was glad that the authors point is that it's made up. Pick a few measurements, pick their units and pick how to combine them so that it sort of fit. Voila, claim to fame!