+Hallucinations are [Perceptions](/wiki/perceptions) that appear real but arise without an external [Stimulus](/wiki/stimulus). These vivid, involuntary experiences across any sense often blur the line between inner world and shared reality.
+## See also
+- [Delusion](/wiki/delusion)
+- [Illusion](/wiki/illusion)
+- [Psychosis](/wiki/psychosis)
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