misreasoning

Verb

misreason (third-person singular simple present misreasons, present participle misreasoning, simple past and past participle misreasoned)

1. To reason badly; to form an irrational conclusion.
   • I could not, indeed, so strangely misreason as to suppose that sensual indulgence produced superior intelect; but I supposed that in some instances superior intellect might cause sensual indulgence.1817, Rev. James Gilchrist, The Intellectual Patrimony; Or a Father's Instructions, page 78

See all 2 meanings of misreason