paralogism Meaning, Definition & Usage

  1. noun an unintentionally invalid argument

WordNet

Pa*ral"o*gism noun
Etymology
Gr. , fr. to reason falsely; beside + to reason, discourse, reason: cf. F. paralogisme.
Definitions
  1. (Logic) A reasoning which is false in point of form, that is, which is contrary to logical rules or formulæ; a formal fallacy, or pseudo-syllogism, in which the conclusion does not follow from the premises.

Webster 1913