Quick Answer: What Does Tautological Mean?

Why is tautology used?

Essentially, a tautology expresses the same thing, idea, or saying repeatedly.

There are many reasons people use tautology in both everyday discussion and poetry, research papers, prose, and song lyrics.

Tautology can demonstrate derision, be used a poetic or literary device, or contain psychological significance..

Why is tautology wrong?

The standard criticism of tautologies goes like this: because of the the fact that tautologies are necessarily true, they do not tell us anything new about the world. They cannot possibly be wrong; therefore, they do not add to our knowledge. They are redundancies, and they ultimately do not need to be stated.

What is the paradox?

A paradox is a statement, proposition, or situation that seems illogical, absurd or self-contradictory, but which, upon further scrutiny, may be logical or true — or at least contain an element of truth. Paradoxes often express ironies and incongruities and attempt to reconcile seemingly opposing ideas.

Are tautologies valid?

If the premises of a propositionally valid argument are tautologies, then its conclusion must be a tautology as well. If the premises of the argument are tautologies, then they are all true under every assignment of truth values to the sentence letters. A valid argument with true premises has a true conclusion.

What is tautological reasoning?

Tautological reasoning is logic that uses the premise as the conclusions, or is too obvious as to be necessary. For example, saying, “When we get a pet we will either get a dog or some other animal” is tautological, as every pet is necessarily either a dog or not a dog.

How do you know if something is a tautology?

If you are given a statement and want to determine if it is a tautology, then all you need to do is construct a truth table for the statement and look at the truth values in the final column. If all of the values are T (for true), then the statement is a tautology.

How do you get rid of tautology?

In order to avoid using tautologies, pay careful attention to the logic of what you are writing….How to Avoid TautologyRe-read and spot tautologies.Delete them, or.Change them to phrases that actually add some information to the first.

What is the difference between tautology and pleonasm?

Pleonasm has a sense of using an unnecessary overabundance of redundant words in one description. Tautology has a sense of saying the exact same in different words, using multiple words with the same meaning.

How do you use tautology in a sentence?

It is now generally recognized that it is mere tautology to speak of zoology and comparative anatomy, and that museum naturalists must give attention as well to the inside as to the outside of animals. In some ways, the notion of exotic fishnet stockings is a tautology, because fishnets are already pretty exotic.

What is the opposite of a tautology?

I am unhappy with the assertion that “the opposite of a tautology is a contradiction, which is a statement that is always false.” Given the definition of a tautology (“A logical tautology is a statement that is true regardless of the truth values of its parts”) this is not true.

Is tautology a fallacy?

A tautology in math (and logic) is a compound statement (premise and conclusion) that always produces truth. No matter what the individual parts are, the result is a true statement; a tautology is always true. The opposite of a tautology is a contradiction or a fallacy, which is “always false”.

What is an example of tautology?

In grammatical terms, a tautology is when you use different words to repeat the same idea. For example, the phrase, “It was adequate enough,” is a tautology. The words adequate and enough are two words that convey the same meaning.

What is it called when you use 2 words that mean the same thing?

If two words are synonymous, they mean the same thing. … In addition to describing words with the same or similar meanings, you can use the adjective synonymous to describe things that are similar in a more figurative way.

Is a tautology always true?

A tautology is a formula which is “always true” — that is, it is true for every assignment of truth values to its simple components. You can think of a tautology as a rule of logic. The opposite of a tautology is a contradiction, a formula which is “always false”.