+Heresy is a [belief](/wiki/belief) or [doctrine](/wiki/doctrine) that deviates significantly from an established tradition, often religious. It challenges accepted [orthodoxy](/wiki/orthodoxy), leading to dissent and sometimes persecution.
+## See also
+- [Apostasy](/wiki/apostasy)
+- [Blasphemy](/wiki/blasphemy)
+- [Schism](/wiki/schism)
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