What is the Opposite(Antonym) of “nonfallacious”?

The Opposite(Antonym) of “nonfallacious”

The antonyms of nonfallacious are fallacious, invalid, and unsound. These antonyms describe arguments or reasoning that are incorrect, flawed, or illogical.

Explore all Antonyms of “nonfallacious”

Definitions and Examples of fallacious, invalid, unsound

Learn when and how to use these words with these examples!

Based on a mistaken belief or unsound reasoning; misleading or deceptive.


The politician's argument was fallacious because it relied on false assumptions.

Not logically or factually supported; not valid or acceptable.


The experiment's results were invalid because the sample size was too small.

Not based on reliable evidence or reasoning; not well-founded or logical.


The company's decision to invest in risky stocks was unsound and led to financial losses.

Key Differences: fallacious vs invalid vs unsound

  • 1Fallacious refers to arguments that are misleading or deceptive.
  • 2Invalid describes arguments that are not logically or factually supported.
  • 3Unsound refers to arguments that are not based on reliable evidence or reasoning.

Effective Usage of fallacious, invalid, unsound

  • 1Critical Thinking: Use these antonyms to evaluate arguments and identify flaws in reasoning.
  • 2Academic Writing: Incorporate these antonyms in essays or research papers to critique existing theories or arguments.
  • 3Debating: Utilize these antonyms to refute opposing arguments and strengthen your own position.

Remember this!

The antonyms fallacious, invalid, and unsound describe arguments or reasoning that are incorrect, flawed, or illogical. Use these words to enhance critical thinking skills, improve academic writing, and strengthen debating skills by identifying flaws in reasoning and refuting opposing arguments.

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