is: any theory that makes use of variables which, if their values were known, would permit more precise predictions of the outcomes of experimental measurements than those of conventional quantum theory. [P10.2]
implies: that quantum theory is an incomplete theory, and that the 'fuzziness' of its predictions is a reflection of our limited understanding and not a feature of the Universe itself. [P10.2]
is opposed: to the conventional Copenhagen interpretation of quantum physics. [P10.2]
Copyright 1997, The Open University