Carlo Rovelli proposes that the confusion with quantum mechanics arises from the incorrect assumption of an observer-independent state of a system. He argues that quantum mechanics should be interpreted as a theory of information, where the state of a system is relative to another system. This view complements existing interpretations like Copenhagen, consistent histories, many-worlds, and others. Rovelli suggests that the formalism of quantum mechanics can be derived from simple physical postulates, rather than being interpreted as a theory of absolute states. He draws an analogy with special relativity, where the concept of absolute simultaneity was replaced by a relational understanding. Similarly, he argues that the notion of observer-independent states in quantum mechanics is flawed, and that the correct approach is to recognize that states and values of physical quantities are relative to an observer. This leads to the conclusion that quantum mechanics is a theory about the relational information between systems, not about absolute states. Rovelli emphasizes that different observers can give different descriptions of the same events, and that the physical world is fully relational. He critiques the idea of an observer-independent reality, arguing that quantum mechanics provides a complete description of the world in terms of the information systems have about each other. The paper discusses the implications of this view, including the relationship between different descriptions of the same events and the nature of measurement. Rovelli concludes that quantum mechanics is a complete and self-consistent theory of the physical world, where all physical quantities are relational, and the concept of an absolute state is physically untenable.Carlo Rovelli proposes that the confusion with quantum mechanics arises from the incorrect assumption of an observer-independent state of a system. He argues that quantum mechanics should be interpreted as a theory of information, where the state of a system is relative to another system. This view complements existing interpretations like Copenhagen, consistent histories, many-worlds, and others. Rovelli suggests that the formalism of quantum mechanics can be derived from simple physical postulates, rather than being interpreted as a theory of absolute states. He draws an analogy with special relativity, where the concept of absolute simultaneity was replaced by a relational understanding. Similarly, he argues that the notion of observer-independent states in quantum mechanics is flawed, and that the correct approach is to recognize that states and values of physical quantities are relative to an observer. This leads to the conclusion that quantum mechanics is a theory about the relational information between systems, not about absolute states. Rovelli emphasizes that different observers can give different descriptions of the same events, and that the physical world is fully relational. He critiques the idea of an observer-independent reality, arguing that quantum mechanics provides a complete description of the world in terms of the information systems have about each other. The paper discusses the implications of this view, including the relationship between different descriptions of the same events and the nature of measurement. Rovelli concludes that quantum mechanics is a complete and self-consistent theory of the physical world, where all physical quantities are relational, and the concept of an absolute state is physically untenable.