Quantum mechanics is a highly statistical theory. Classical physics is usually regarded as deterministic, that probability is not nearly as fundamental concerning measurement and interrelation of variables. Might it be so that classical physics is just as reliant on probability, albeit in different form, as quantum mechanics? The non-quantum realm relies on interpolation and extrapolation; linear and nonlinear error; precision and accuracy; standards of measurement; the correspondence principle; hypothesis and prediction; the eventual horizon to and mutability of classical laws. Would classical physics not exist without probability?