Skeptical Fundamentalism 

Skeptical Fundamentalism is a variation of secular fundamentalism where secular fundamentalism is used in a way to doubt, mock and challenge religion, spirituality, esoterics, occultism, supernaturality and extraphysics using of atheism, scientism, materialism, physicalism and positivism for do so in a way that it always seek to put those as delusions, schizophrenia, psychosis and hallucinations and the things that skeptical fundamentalism supports as the absolute true of reality. Skeptical fundamentalism is often support by skeptical zealots, that are the evolution of atheist zealots, and it's really common inside secular fundamentalism and scientistic fundamentalism, besides often compared to religious fundamentalism.

"Skeptical fundamentalism is just really bad as secular fundamentalism and religious fundamentalism, the skeptical movement is majoritarian follower of skeptical fundamentalism and secular fundamentalism, it should change, but it only change with a massive groundwork showing why secular fundamentalism and skeptical fundamentalism are no different from religious fundamentalism."

Skeptical Fundamentalism by Full Monteirism May 11, 2021

Skeptic Fundamentalism

A rigid adherence to a particular version of skepticism (often that of the 19th-century freethinkers or the new atheists) that treats any deviation as heresy. Skeptic fundamentalism rejects not only pseudoscience but also agnosticism, Bayesian epistemology, and even moderate skepticism as "weak." It often demands absolute certainty and treats probability as cowardice. It is skepticism as an unquestionable orthodoxy.

Example: "He declared that 'skeptics must never say maybe'—skeptic fundamentalism, confusing certainty with rigor."

Skeptic Dogmatism

The tendency to treat skeptical conclusions (e.g., "ESP is impossible") as proven facts, rather than as provisional findings subject to revision. Skeptic dogmatism shuts down investigation by declaring certain questions already answered, and it often dismisses anomalous evidence without examination. It is the opposite of genuine skepticism, which remains open to new evidence. Dogmatic skepticism is just another form of belief.

Example: "When shown preliminary evidence for psi, he said 'that's impossible' without looking—skeptic dogmatism, prejudice disguised as rationality."

Skeptic Fundamentalism by Dumu The Void April 18, 2026