fallacious

(s) containing or based on a fallacy
- fallacious reasoning
- an unsound argument
unsound,
(s) intended to deceive
- deceitful advertising
- fallacious testimony
- smooth, shining, and deceitful as thin ice" - S.T.Coleridge
- a fraudulent scheme to escape paying taxes
deceitful, fraudulent,
(s) based on an incorrect or misleading notion or information
- fallacious hope

unsound deceitful fraudulent

fallaciousness