  I show how the quantum paradoxes occurring when we adopt a standard realist
framework (or a framework in which the collapse implies a physical change of
the state of the system) vanish if we abandon the idea that a measurement is
related (directly or indirectly) to a physical change of state. In Convivial
Solipsism, similarly to Everett interpretation, there is no collapse of the
wave function. But contrary to Everett interpretation, there is only one world.
This allows also to get rid of any non-locality and to provide a solution to
the Wigner friend problem and its more recent versions.
