from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A fallacious or illogical argument or conclusion.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A fallacious argument or illogical conclusion, especially one committed by mistake, or believed by the speaker to be logical.
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. In logic, fallacious argument or false reasoning; reasoning which is false in form—that is, in which the conclusion does not follow from the premises; a conclusion unwarranted by the premises.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an unintentionally invalid argument
Late Latin paralogismus, from Greek paralogismos, from paralogos, unreasonable : para-, beyond; see para-1 + logos, reason; see leg- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle French paralogisme, form Latin paralogismus, from Ancient Greek παραλογισμός. (Wiktionary)