The first day of physics 211 (calculus based) at my school, our teacher started us out with dimentional analysis and it's importance. We started with the plank length which is in meters and while he didn't specify why, we used the plank constant ,gravitational constant, and the speed of light to find the length of a plank. This relates to my thought from limits in calculus. If we define a limit as infentesimally small point away from another. What does this imply that all of motion could be very accurate estimates ?. If we have a length (a plank) that is where macro physics breaks down doesn't that imply that our entire universe is fuzzy ? That all of reality is just slightly better estimates and that we don't have a true exact value for a position? Note: this is just my thoughts and I would love to hear from both graduated physics majors as I am only a freshman. Edit: sorry admins for the wrong section, thank you for moving my thread to a better spot!