  Three problems stand in the way of deriving classical theories from quantum
mechanics: those of realist interpretation, of classical properties and of
quantum measurement. Recently, we have identified some tacit assumptions that
lie at the roots of these problems. Thus, a realist interpretation is hindered
by the assumption that the only properties of quantum systems are values of
observables. If one simply postulates the properties to be objective that are
uniquely defined by preparation then all difficulties disappear. As for
classical properties, the wrong assumption is that there are arbitrarily sharp
classical trajectories. It turns out that fuzzy classical trajectories can be
obtained from quantum mechanics by taking the limit of high entropy. Finally,
standard quantum mechanics implies that any registration on a quantum system is
disturbed by all quantum systems of the same kind existing somewhere in the
universe. If one works out systematically how quantum mechanics must be
corrected so that there is no such disturbance, one finds a new interpretation
of von Neumann's "first kind of dynamics", and so a new way to a solution of
the quantum measurement problem. The present paper gives a very short review of
this work.
