Hi! I found a few old threads lying around regarding this, such as this one, but I thought I'd start a new one asking the question in my own way. So here goes. Is the uncertainty described by the Uncertainty Principal a result of the fact that by measuring something we affect it, or a result of the fundamental nature of sub-atomic particles? If it's just the nature of things, then is the fact that we also can't measure things without affecting them just compounding the issue, like salt in a wound? Super-bonus-follow-up question: Does the idea that we can't measure things without affecting them hold true on a macroscopic level as well, but just not significantly so?