Undistributed middle meaning

The undistributed middle fallacy occurs when the middle term in a syllogism is not distributed in the premises, leading to an invalid conclusion.


Undistributed middle definitions

Word backwards detubirtsidnu elddim
Part of speech The term "undistributed middle" functions as a noun phrase.
Syllabic division un-dis-trib-ut-ed mid-dle
Plural The plural of the word undistributed middle is undistributed middles.
Total letters 19
Vogais (3) u,i,e
Consonants (8) n,d,s,t,r,b,m,l

Undistributed middle is a fallacy in formal logic where the middle term in a syllogism is not distributed.

What is Undistributed Middle?

Undistributed middle occurs when the middle term in a syllogism fails to distribute over the subject or predicate of a conclusion.

Example of Undistributed Middle:

An example of undistributed middle is: All birds have wings. Bats have wings. Therefore, bats are birds. In this example, the term "wings" is the middle term that is not distributed.

Impact on Logical Reasoning:

Undistributed middle can lead to faulty reasoning and invalid conclusions, as the middle term is not properly connected to the other terms in the syllogism.

It is essential to identify instances of undistributed middle in logical arguments to ensure the validity and soundness of the reasoning presented.

Understanding the concept of undistributed middle is crucial for anyone studying logic or critical thinking, as it is a common fallacy that can undermine the strength of an argument.

By being aware of undistributed middle and other fallacies, one can sharpen their analytical skills and become more adept at identifying and evaluating the validity of arguments.


Undistributed middle Examples

  1. All cats have whiskers. All dogs have whiskers. Therefore, all cats are dogs.
  2. Red roses are flowers. Tulips are flowers. Therefore, red roses are tulips.
  3. Mercedes makes luxury cars. Lexus makes luxury cars. Therefore, Mercedes makes Lexus.
  4. Trees have leaves. Grass has leaves. Therefore, trees are grass.
  5. All apples are fruits. All oranges are fruits. Therefore, all apples are oranges.
  6. Robins are birds. Penguins are birds. Therefore, robins are penguins.
  7. Blueberries are berries. Strawberries are berries. Therefore, blueberries are strawberries.
  8. Pianos are musical instruments. Flutes are musical instruments. Therefore, pianos are flutes.
  9. Sean is a human. Rand is a human. Therefore, Sean is Rand.
  10. Horses have hooves. Cows have hooves. Therefore, horses are cows.


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  • Updated 01/04/2024 - 08:55:54