  A brief discussion is given of measurement within the context of a theory of
"beables", e.g. theories of de Broglie, Bohm, Bell, Vink, and also "modal"
theories. It is shown that even in an ideal von Neumann measurement of a
beable, the measured value may not agree with the value which the beable had
prior to the measurement.

Quantum Physics;High Energy Physics - Theory