  Recalling the state of the art in the interpretation of quantum physics, this
paper emphasizes that one cannot simply add a collapse parameter to the
Schr\~A{\P}dinger equation in order to solve the measurement problem. If one
does so, one is also committed to a primitive ontology of a configuration of
matter in physical space in order to have something in the ontology that
constitutes the determinate measurement outcomes. The paper then argues that in
the light of this consequence, the collapse postulate loses its attractiveness
in comparison to an ontology of persisting particles moving on continuous
trajectories according to a deterministic law.
