A philosophical or ideological position; though not commonly used, it could refer to a belief system based on accepting or propagating falsehoods.
From 'false' + '-ism' suffix (indicating a system or theory). This is an extremely rare coinage and doesn't appear in most standard dictionaries.
This word barely exists in English—it's more of a theoretical possibility showing how '-ism' can attach to almost any concept—but some philosophers have used it ironically when discussing postmodern approaches to truth.
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