Well that's just the thing then, isn't it? It's only a measurement, and measurements have error associated with them, because depending on the accuracy of the tool used to take them, and the variability among the person taking the measurement, it's going to come out different from time to time.
Oh man, don't tell me I'm actually applying something I learned in undergrad...
Oh man, don't tell me I'm actually applying something I learned in undergrad...