'Space is blue and birds fly through it'

Abstract

Quantum mechanics is not about 'quantum states': it is about values of physical variables. I give a short fresh presentation and update on the relational perspective on the theory, and a comment on its philosophical implications.This article is part of a discussion meeting issue 'Foundations of quantum mechanics and their impact on contemporary society'.

Keywords: interpretations of quantum mechanics; quantum state; relational quantum mechanicsŠ; relations; wave function.