fallacious

American  

[fuh-ley-shuhs] / fəˈleɪ ʃəs /

adjective

1. containing a fallacy; logically unsound.

   fallacious arguments.

2. deceptive; misleading.

   fallacious testimony.

3. disappointing; delusive.

   a fallacious peace.

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fallacious British  

/ fəˈleɪʃəs /

adjective

1. containing or involving a fallacy; illogical; erroneous

2. tending to mislead

3. delusive or disappointing

   a fallacious hope

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Other Word Forms

• fallaciously adverb
• fallaciousness noun
• nonfallacious adjective
• nonfallaciously adverb
• nonfallaciousness noun
• unfallacious adjective
• unfallaciously adverb

Etymology

Origin of fallacious

First recorded in 1500–10, fallacious is from the Latin word fallāciōsus deceitful, deceptive. See fallacy, -ous

Example Sentences

Podcasters validate their fears and doubts, cite fallacious research, or more speciously, quote the all-purpose source of “some” or “they” without evidence.

From Salon

Eritrea’s information minister on Wednesday called the report “fallacious.”

From Washington Times

He argued that the constitutional change had reset the clock to zero, but legal experts in Senegal and abroad dismissed the contention as fallacious.

From New York Times

“Everything would be taken to be shredded in due course. … The document was taken when I was not there and leaked out of context, helping to fuel fallacious narratives against me.”

From Washington Post

Cognitive biases, like confirmation bias, play a huge role in supporting such a fallacious thought process to detrimental ends.

From Salon