No, I am talking about one thing. Even if you measure the same thing over and over again you will get different values. Those values come together to form a bell curve that describes the measurement as a statistic, and you can "know" the measurement by looking at the value that is indicated by the central tendency of the curve. Central tendency is determined by either mean, mode, or median value.
For example, if you have a sword you could measure the weight (or length, width, shinyness, or whatever characteristic you are using to assign value) of the sword 11 times and you will get 11 different numbers that will fit within a normal distribution shaped like a bell. The sources that will bring the most variance to the measurement are the measuring device and the person measuring, but the sword will change weight over time.
Rhizo
For example, if you have a sword you could measure the weight (or length, width, shinyness, or whatever characteristic you are using to assign value) of the sword 11 times and you will get 11 different numbers that will fit within a normal distribution shaped like a bell. The sources that will bring the most variance to the measurement are the measuring device and the person measuring, but the sword will change weight over time.
Rhizo