Page "Principle of locality" Paragraph 11

In most of the conventional interpretations, such as the Copenhagen interpretation and the interpretation based on Consistent Histories, where the wavefunction is not assumed to physically exist in real space-time, it is local realism that is rejected.

These interpretations propose that actual definite properties of a physical system " do not exist " prior to the measurement ; and the wavefunction has a restricted interpretation, as nothing more than a mathematical tool used to calculate the probabilities of experimental outcomes, hence in agreement with positivism in philosophy as the only topic that science should discuss.