When you watch Walter Lewin's physics lectures, he repeatedly says "measurement means nothing without stating the uncertainty". see - Lec 01: Units, Dimensions

When you watch Walter Lewin's physics lectures, he repeatedly says "measurement means nothing without stating the uncertainty". see - Lec 01: Units, Dimensions, and Scaling Arguments | 8.01 Classical Mechanics (Walter Lewin) [1] [1] https://www.youtube.com/watch?v=X9c0MRooBzQ#t=4m30s https://www.youtube.com/watch?v=X9c0MRooBzQ#t=4m30s Physics Works !