Containing or based on a fallacy: a fallacious assumption. (adjective)
Tending to mislead; deceptive: fallacious testimony. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "fallacious" in a sentence
"Nope, one-liners that are fallacious is the best you can muster I suppose."
"And conveniently forgotten in fallacious references to a cycle of violence is that — following from their oft-stated call for the destruction of Israel — Hamas, Hezbollah (which is more or less an Iranian expeditionary force), Iran itself, and the Arab confrontation states are the parties that want to change the status quo, by violence and by their own flamboyant admission."
"Does he not on the contrary feel a freedom of will within him, which, though you may call it fallacious, still actuates him as he decides?"