# Why is it wrong to answer a question with a tautology? Isn’t “2+2” correct when answering ‘What is “2+2″‘?

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## What is a tautological question?

What’s a 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 an example of tautology?

Tautology is the use of different words to say the same thing twice in the same statement. ‘The money should be adequate enough‘ is an example of tautology. Synonyms: repetition, redundancy, verbiage, iteration More Synonyms of tautology.

## What is a tautology math?

A tautology is a logical statement in which the conclusion is equivalent to the premise. More colloquially, it is formula in propositional calculus which is always true (Simpson 1992, p. 2015; D’Angelo and West 2000, p.

## Can a tautology be false?

In other words it cannot be false. It cannot be untrue. Unsatisfiable statements, both through negation and affirmation, are known formally as contradictions. A formula that is neither a tautology nor a contradiction is said to be logically contingent.

## Why is tautology used?

Tautology is a literary device whereby writers say the same thing twice, sometimes using different words, to emphasize or drive home a point. It can be seen as redundancy, a style fault that adds needless words to your idea, statement, or content; or it can be defended as poetic license.

## How do you solve 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.

## What is not a tautology?

T. A tautology is a formula or assertion that is true in every possible interpretation. So, by the truth table (p ∨ q) → (p ∨ (~q)) statement is not a tautology. A tautology is a statement that is always true, no matter what.

## What is tautology and contradiction with example?

A proposition P is a tautology if it is true under all circumstances. It means it contains the only T in the final column of its truth table. Example: Prove that the statement (p⟶q) ↔(∼q⟶∼p) is a tautology.

## What is tautology in a sentence?

Tautology is the use of different words to say the same thing twice in the same statement. ‘The money should be adequate enough‘ is an example of tautology. Synonyms: repetition, redundancy, verbiage, iteration More Synonyms of tautology.

## Should tautology be avoided?

Tautologies are rarely considered necessary. Although creative repetition in songs, poetry, or comedy can emphasize a certain idea or subject, tautologies are generally uncreative and unwanted mistakes.

## What does tautology mean in logic?

tautology, in logic, a statement so framed that it cannot be denied without inconsistency. Thus, “All humans are mammals” is held to assert with regard to anything whatsoever that either it is not a human or it is a mammal.

## Which statement is the tautology statement?

Note: The students must know that Tautology is a statement which is always true. Here, we can clearly see that since in option C we have \$p \vee \sim p\$ which is no matter what is always going to be true always. Hence, we have the option C as a tautology.

p q \$ \sim q\$
F F T

## Is every true statement a tautology?

~p is a tautology. Definition: A compound statement, that is always true regardless of the truth value of the individual statements, is defined to be a tautology.
Search form.

1. A number is even or a number is not even.
4. A triangle is isosceles or a triangle is not isosceles.

## How do you find tautology contradiction?

To determine whether a proposition is a tautology, contradiction, or contingency, we can construct a truth table for it. If the proposition is true in every row of the table, it’s a tautology. If it is false in every row, it’s a contradiction.

A compound statement which is always true is called a tautology , while a compound statement which is always false is called a contradiction .

## What is a tautology or contradiction?

A tautology is an assertion of Propositional Logic that is true in all situations; that is, it is true for all possible values of its variables. A contradiction is an assertion of Propositional Logic that is false in all situations; that is, it is false for all possible values of its variables.

## What is the difference between tautologies and contradictions?

A tautology is a statement that is true in virtue of its form. Thus, we don’t even have to know what the statement means to know that it is true. In contrast, a contradiction is a statement that is false in virtue of its form.

## Could a sentence which is a contradiction ever be a tautology?

A conditional sentence with a TT-contradiction as its antecedent is a tautology. That’s because a conditional comes out true on every row in which its antecedent is false. But if the antecedent is a TT-contradiction, it’s false on every row. So the conditional is true on every row, i.e., is a tautology.