Free thought

Freethought (or "free thought") is a philosophical viewpoint which holds that positions regarding truth should be formed on the basis of logic, reason, and empiricism, rather than authority, tradition, revelation, or other dogma. The cognitive application of freethought is known as "freethinking", and practitioners of freethought are known as "freethinkers". The term first came into use in the 17th century in order to indicate people who inquired into the basis of traditional religious beliefs.

Freethinkers hold that knowledge should be grounded in facts, scientific inquiry, and logic. The skeptical application of science implies freedom from the intellectually limiting effects of confirmation bias, cognitive bias, conventional wisdom, popular culture, prejudice, or sectarianism.

Atheist author Adam Lee defines freethought as thinking which is independent of revelation, tradition, established belief, and authority, and considers it as a "broader umbrella" than atheism "that embraces a rainbow of unorthodoxy, religious dissent, skepticism, and unconventional thinking."

The basic summarizing statement of the essay The Ethics of Belief by the 19th-century British mathematician and philosopher William Kingdon Clifford is: "It is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence." The essay became a rallying cry for freethinkers when published in the 1870s, and has been described as a point when freethinkers grabbed the moral high ground. Clifford was himself an organizer of freethought gatherings, the driving force behind the Congress of Liberal Thinkers held in 1878.

Regarding religion, freethinkers typically hold that there is insufficient evidence to support the existence of supernatural phenomena. According to the Freedom from Religion Foundation, "No one can be a freethinker who demands conformity to a bible, creed, or messiah. To the freethinker, revelation and faith are invalid, and orthodoxy is no guarantee of truth." and "Freethinkers are convinced that religious claims have not withstood the tests of reason. Not only is there nothing to be gained by believing an untruth, but there is everything to lose when we sacrifice the indispensable tool of reason on the altar of superstition. Most freethinkers consider religion to be not only untrue, but harmful."

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