A critique of Bohr's local realism
pp. 269-277
in: Jan Faye, Henry J. Folse (eds), Niels Bohr and contemporary philosophy, Berlin, Springer, 1994Abstract
At the same time we must deny the universal validity of the superposition principle [which here does duty for all the quantum theoretic formalism] and must admit that it is but a (very useful) instrument of prediction. (Feyerabend, 1981, 258)1