Daniel Dennett in the context of Philosophical zombie

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.

Ray Jackendoff (born January 23, 1945) is an American linguist. He is professor of philosophy, Seth Merrin Chair in the Humanities and was, with Daniel Dennett, co-director of the Center for Cognitive Studies at Tufts University. He has always straddled the boundary between generative linguistics and cognitive linguistics, committed to both the existence of an innate universal grammar (an important thesis of generative linguistics) and to giving an account of language that is consistent with the current understanding of the human mind and cognition (the main purpose of cognitive linguistics).

Jackendoff's research deals with the semantics of natural language, its bearing on the formal structure of cognition, and its lexical and syntactic expression. He has conducted extensive research on the relationship between conscious awareness and the computational theory of mind, on syntactic theory, and, with Fred Lerdahl, on musical cognition, culminating in their generative theory of tonal music. His theory of conceptual semantics developed into a comprehensive theory on the foundations of language, which indeed is the title of a monograph (2002): Foundations of Language. Brain, Meaning, Grammar, Evolution. In his 1983 Semantics and Cognition, he was one of the first linguists to integrate the visual faculty into his account of meaning and human language.

New Atheism is a 21st-century movement promoted by some atheist academics, writers, scientists, and philosophers opposed to superstition, religion, and irrationalism. New Atheists advocate the antitheist view that the various forms of theism should be examined, countered by rational arguments and criticised, especially when they exert strong influence on the broader society, such as in government, education, and politics.

Major figures of New Atheism include Richard Dawkins, Daniel Dennett, Christopher Hitchens, and Sam Harris, collectively referred to as the "Four Horsemen" of the movement. Proponents of the New Atheist movement have experienced some controversy and criticisms from academics and other atheists.

Samuel Benjamin Harris (born April 9, 1967) is an American neuroscientist, philosopher, author, and podcast host. His work touches on a range of topics, including rationality, religion, ethics, free will, determinism, neuroscience, meditation, psychedelics, philosophy of mind, politics, terrorism, and artificial intelligence. Harris came to prominence for his criticism of religion, and he is known as one of the "Four Horsemen" of New Atheism, along with Richard Dawkins, Christopher Hitchens, and Daniel Dennett.

Harris's first book, The End of Faith (2004), won the PEN/Martha Albrand Award for First Nonfiction and remained on The New York Times Best Seller list for 33 weeks. He has since written six additional books: Letter to a Christian Nation (2006); The Moral Landscape: How Science Can Determine Human Values (2010); the essay Lying (2011); the short book Free Will (2012); Waking Up: A Guide to Spirituality Without Religion (2014); and (with British writer Maajid Nawaz) Islam and the Future of Tolerance: A Dialogue (2015). His work has been translated into over 20 languages.

The Center for Cognitive Studies at Tufts University is a research unit for various research projects in cognitive studies. Daniel Dennett and Ray Jackendoff were Co-Directors.