fallaciousness

/fəˈleɪʃəsnəs/
noun
  1. The quality or state of being based on false or unsound reasoning; misleadingness.
    • Scientists pointed out the fallaciousness of the study's conclusions.
    • She demonstrated the fallaciousness of the popular belief with simple evidence.
    • The fallaciousness of his argument became clear when we checked the facts.
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