 By contrast, QBists hold a subjective Bayesian or personalist view of quantum probabilities (see entry on  interpretations of probability).  Taking a quantum state merely to provide input to the Born Rule specifying these probabilities, they regard quantum state assignments as equally subjective. The quantum state assigned by an agent then provides a convenient representation of an important part of his or her own overall state of belief. So quantum theory as a whole is “a users’ manual that any agent can pick up and use to help make wiser decisions in this world of inherent uncertainty” (Fuchs 2010, 8,  Other Internet Resources).