  Grounded on the quantum measurement riddle, a general argument against the
universal validity of the superposition principle was recently put forward by
Bassi and Ghirardi. It is pointed out that this argument is valid only within
the realm of the philosophy of ``objectivistic realism'' which is not a
necessary part of the foundations of physics, and that recent developments
including decoherence theory do account for the appearance of macroscopic
objects without resorting to a break of the principle.
