Unreal Beliefs is an outstanding addition to the literature on the metaphysics of belief. Poslajko's sophisticated anti-realism about belief will be of interest not only to philosophers of mind but to anyone concerned with realist versus anti-realist debates more generally.

Alex Miller, Professor of Philosophy, University of Otago, New Zealand

A clear, thorough, deeply systematic, and highly original discussion of the ontological status of beliefs. Poslajko's innovative treatment promises to reignite the debate about the psychological reality of the central category of our folk psychological ontology.

Tadeusz Zawidzki, Associate Professor and Chair of Philosophy, George Washington University, USA

Poslajko leads us on a wide-ranging tour of the nature of belief, showing us how debates in the 1980s on the reality or unreality of belief look through the lens of 21st-century metaphysics and philosophy of mind. He offers a plausible defence of the surprising view that although beliefs exist, they are not fully real and will likely not play a role in a mature cognitive science.

Eric Schwitzgebel, Professor of Philosophy, University of California, Riverside, USA