Daniel Dennett in the context of "Tufts University"

A belief is a subjective attitude that something is true or a state of affairs is the case. A subjective attitude is a mental state of having some stance, take, or opinion about something. In epistemology, philosophers use the term belief to refer to attitudes about the world which can be either true or false. To believe something is to take it to be true; for instance, to believe that snow is white is comparable to accepting the truth of the proposition "snow is white". However, holding a belief does not require active introspection. For example, few individuals carefully consider whether or not the sun will rise the next morning, simply assuming that it will. Moreover, beliefs need not be occurrent (e.g., a person actively thinking "snow is white"), but can instead be dispositional (e.g., a person who if asked about the color of snow would assert "snow is white").

There are various ways that contemporary philosophers have tried to describe beliefs, including as representations of ways that the world could be (Jerry Fodor), as dispositions to act as if certain things are true (Roderick Chisholm), as interpretive schemes for making sense of someone's actions (Daniel Dennett and Donald Davidson), or as mental states that fill a particular function (Hilary Putnam). Some have also attempted to offer significant revisions to our notion of belief, including eliminativists about belief who argue that there is no phenomenon in the natural world which corresponds to our folk psychological concept of belief (Paul Churchland) and formal epistemologists who aim to replace our bivalent notion of belief ("either we have a belief or we don't have a belief") with the more permissive, probabilistic notion of credence ("there is an entire spectrum of degrees of belief, not a simple dichotomy between belief and non-belief").

Eliminative materialism (also called eliminativism) is a materialist position in the philosophy of mind that expresses the idea that the majority of mental states in folk psychology do not exist. Some supporters of eliminativism argue that no coherent neural basis will be found for many everyday psychological concepts such as belief or desire, since they are poorly defined. The argument is that psychological concepts of behavior and experience should be judged by how well they reduce to the biological level. Other versions entail the nonexistence of conscious mental states such as pain and visual perceptions.

Eliminativism about a class of entities is the view that the class of entities does not exist. For example, materialism tends to be eliminativist about the soul; modern chemists are eliminativist about phlogiston; modern biologists are eliminativist about élan vital; and modern physicists are eliminativist about luminiferous ether. Eliminative materialism is the relatively new (1960s–70s) idea that certain classes of mental entities that common sense takes for granted, such as beliefs, desires, and the subjective sensation of pain, do not exist. The most common versions are eliminativism about propositional attitudes, as expressed by Paul and Patricia Churchland, and eliminativism about qualia (subjective interpretations about particular instances of subjective experience), as expressed by Daniel Dennett, Georges Rey, and Jacy Reese Anthis.

Marc D. Hauser (born October 25, 1959) is an American evolutionary biologist and a researcher in primate behavior, animal cognition and human behavior and neuroscience. Hauser was a professor of psychology at Harvard University from 1998 to 2011. In 2010 Harvard found him guilty of research misconduct, specifically fabricating and falsifying data, after which he resigned. Because Hauser's research was financed by government grants, the Office of Research Integrity of the Health and Human Services Department also investigated, finding in 2012 that Hauser had fabricated data, manipulated experimental results, and published falsified findings.

Christopher Eric Hitchens (13 April 1949 – 15 December 2011) was a British and American author and journalist. He authored 18 books on faith, religion, culture, politics, and literature.

Hitchens was born and educated in Britain, graduating in 1970 from the University of Oxford with a degree in philosophy, politics, and economics. In the early 1980s, he emigrated to the United States and wrote for The Nation and Vanity Fair. Known as one of the "Four Horsemen" of New Atheism (along with Richard Dawkins, Sam Harris, and Daniel Dennett), he gained prominence as a columnist and speaker. His epistemological razor, which states that "what can be asserted without evidence can also be dismissed without evidence", is still of mark in philosophy and law. Hitchens's political views evolved greatly throughout his life. Originally describing himself as a democratic socialist, he was a member of various socialist organisations in his early life, including the Trotskyist International Socialists.