# Ab absurdo – Definition & Meaning

Conclusion

Ab absurdo is a Latin term that is used in various fields, including mathematics, philosophy, and logic. The term is often used to describe a type of argument that is based on the absurdity of a particular proposition or conclusion. In this article, we will explore the meaning and definition of ab absurdo, its origin, and its significance in different contexts.

## Definitions

Ab absurdo is a Latin phrase that means “from the absurd.” It is a type of argument that is used to prove a proposition or conclusion by demonstrating that the opposite is absurd or impossible. In other words, it is a form of reasoning that starts with an absurd or impossible assumption and then shows that it leads to a contradiction or inconsistency.

## Origin

The term ab absurdo has its roots in Latin, where “ab” means “from” and “absurdo” means “absurd.” The term was first used in the context of logic and philosophy, where it was used to describe a type of argument that is based on the absurdity of a particular proposition or conclusion.

## Meaning in different dictionaries

According to the Oxford English Dictionary, ab absurdo is “a method of proving the truth of a proposition by showing that its negation leads to an absurdity.” Merriam-Webster defines it as “a method of proving the truth of a proposition by showing that the proposition’s negation leads to a contradiction.”

## Associations

Ab absurdo is often associated with the concept of reductio ad absurdum, which is a type of argument that is used to demonstrate the falsity of a proposition by showing that its logical consequences lead to an absurd or contradictory conclusion.

## Synonyms

Synonyms of ab absurdo include “reductio ad absurdum,” “proof by contradiction,” and “proof by absurdity.”

## Antonyms

Antonyms of ab absurdo include “proof by example,” “proof by induction,” and “proof by deduction.”

## The same root words

The root words of ab absurdo are “ab,” which means “from,” and “absurdo,” which means “absurd.” Other words that share these root words include “abnormal,” “abstain,” and “absurdity.”

## Example Sentences

1. “The argument that the earth is flat can be easily disproved ab absurdo.”
2. “Ab absurdo, we can prove that all cats are green.”
3. “The philosopher used ab absurdo to demonstrate the absurdity of the idea that nothing exists.”

Ab absurdo is a Latin term that is used to describe a type of argument that is based on the absurdity of a particular proposition or conclusion. It is a form of reasoning that starts with an absurd or impossible assumption and then shows that it leads to a contradiction or inconsistency. The term has its roots in logic and philosophy and is often associated with the concept of reductio ad absurdum.