affirmation of the consequent

Definition of affirmation of the consequent

: the logical fallacy of inferring the truth of the antecedent of an implication from the truth of the consequent (as in, “if it rains, then the game is cancelled and the game has been cancelled, therefore it has rained”)

called also assertion of the consequent

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of affirmation of the consequent

1854, in the meaning defined above

Keep scrolling for more

Learn More about affirmation of the consequent

Time Traveler for affirmation of the consequent

Time Traveler

The first known use of affirmation of the consequent was in 1854

See more words from the same year

Statistics for affirmation of the consequent

Cite this Entry

“Affirmation of the consequent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/affirmation%20of%20the%20consequent. Accessed 22 Oct. 2020.

Comments on affirmation of the consequent

What made you want to look up affirmation of the consequent? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!