Newton's laws, coulomb's law are all very neat but are they totally accurate? According to modern instruments which can measure up-to remarkable precision, do these laws behave perfectly? I haven't studied quantum mechanics yet but as far as I have heard it's all about probabilities ... we can't predict anything, all we can say is about the probability of a certain event happening. So how come there exists such precise relations among physical things when underneath there is so much randomness? I can only think that these laws are only an approximation and don't behave perfectly. Further how do we even test these laws? There are so many variables to consider but I suppose that's a different question.