QBism
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In physics and the philosophy of physics, QBism is an interpretation of quantum mechanics that takes an agent's actions and experiences as the central concerns of the theory. It is the most prominent
British philosopher, mathematician, and economist Frank Ramsey, whose interpretation of probability theory inspired quantum Bayesianism.
Jean Metzinger, 1912, Danseuse au café. One advocate of QBism, physicist David Mermin, describes his rationale for choosing that term over the older and more general "quantum Bayesianism": "I prefer [the] term 'QBist' because [this] view of quantum mechanics differs from others as radically as cubism differs from renaissance painting ..."
Group photo from the 2005 University of Konstanz conference Being Bayesian in a Quantum World.
Frank P. Ramsey
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Frank Plumpton Ramsey was a British philosopher, mathematician, and economist who made major contributions to all three fields before his death at the age of 26. He was a close friend of Ludwig Wittge
QBism
…Specifically, QBism adopts a personalist Bayesian interpretation along the lines of Italian mathematician Bruno de Finetti and English philosopher Frank Ramsey. According to QBists, the advantages of adopting this view of probability are twofold. First, for QBists the role of quantum states, such as the…
Ramsey, c. 1921