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Comment author: Daniel5 04 May 2008 10:59:00PM 1 point [-]

Enginerd: The uncertainty inherent in determining a pair of conjugate variables - such as the length and pitch of a sound - is indeed a core part of QM, but is not probabilistic. In this case, the term "uncertainty" is not about probabilities, even if QM is probabilistic in general, rather a consequence of describing states in terms of wave functions, which can be interpreted probabilistically. This causes many to mistakenly think the Heisenberg's "Uncertainty Principle" is the probabilistic part of QM. As Wikipedia[1] puts it: "The uncertainty principle is related to the observer effect, with which it is often conflated."

[1] http://en.wikipedia.org/wiki/Uncertainty_principle