tautology, in logic, a statement so framed that it cannot be denied without inconsistency.

What is an example of a 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.

What is a tautology statement?

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.

What is a tautology argument?

A tautological argument is otherwise known as a circular argument, that is, one that begins by assuming the very thing that is meant to be proven by the argument itself. ... This appears to be a legitimate argument, but if we take it apart, there is not much substance there.

What is tautology in psychology?

n. 1. in logic, a statement that is always and necessarily true by virtue of the meaning of its component terms and that therefore has no propositional content, as Either he is alive or he is not alive. See also circular reasoning. 2.

Tautologies and Contradictions

42 related questions found

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.

What is the meaning of tautological?

1a : needless repetition of an idea, statement, or word Rhetorical repetition, tautology ('always and for ever'), banal metaphor, and short paragraphs are part of the jargon.— Philip Howard. b : an instance of such repetition The phrase "a beginner who has just started" is a tautology.

Is tautology and validity same?

In one hand, by the definition of validity, the conclusion must be true if all of the statements in the argument are true. On the other hand, an argument is tautology when it's always true, regardless the truth or falseness of its promises.

Is tautology a fallacy?

Tautology Definition

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".

How do you tell if an argument is a tautology?

If you are given any statement or argument, you can determine if it is a tautology by constructing a truth table for the statement and looking at the final column in the truth table. If all of the truth values in the final column are true, then the statement is a tautology.

What is an example of a tautology in logic?

In mathematical logic, a tautology (from Greek: ταυτολογία) is a formula or assertion that is true in every possible interpretation. An example is "x=y or x≠y". Similarly, "either the ball is green, or the ball is not green" is always true, regardless of the colour of the ball.

Which of the following statement is a tautology?

It is clear that (~q∧p)∨(p∨~p) is tautology.

Why is tautology used?

Tautology is a literary device used by writers to say something more than once, using the same words or synonymous words. The intent of this device is to emphasize a point or idea for an audience or reader.

Is global pandemic a tautology?

The WHO definition is: "A pandemic is the worldwide spread of a new disease". By that criterion, "global pandemic" would indeed seem to be a tautology. ... It's a term from ancient Greek, meaning literally "sharpdull," so that it comes to symbolise words or phrases which contradict each other.

What is the difference between tautology and redundancy?

Redundancy is any kind of repetition: phrases, sentences, paragraphs, entire books, it's all the same; the scale isn't important. A tautology refers to phrasing that repeats a single meaning in identical words: They followed each other one after the other in succession.

What is the difference between tautology and contradiction?

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

Is tautology circular reasoning?

Circular reasoning refers to certain arguments in which a single premise asserts or implies the intended conclusion. A tautology is a single proposition, not an argument, that is true due to its form alone (therefore true in any model).

Is round circle a tautology?

Something tautological is redundant and circular, especially when talking about logic. ... We use the word tautological for statements that go in a circle, like this sentence: "A circle is circular." This is a logical problem, because it doesn't make sense to define something in terms of itself.

Is tautology begging the question?

Used in this sense, the word beg means "to avoid," not "ask" or "lead to." Begging the question is also known as a circular argument, tautology, and petitio principii (Latin for "seeking the beginning").

Can an argument be a tautology?

A valid argument with true premises has a true conclusion. ... This implies that the conclusion is a tautology. Therefore, if the premises of a propositionally valid argument are tautologies, then its conclusion must be a tautology as well.

Why 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".

What is the negation of a tautology?

A tautology is true on every row of its truth-table, so when you negate a tautology, the resulting sentence is false on every row of its table. That is, the negation of a tautology is a TT-contradiction. ... A TT-contingent sentence comes out true on at least one row of its truth-table and false on at least one row.

What is tautology in research?

Tautology. core definition. A tautology is a proposition that is true by definition (such as 'all mothers are female') or one in which the same thing is said twice in different words (e.g. 'they followed one after the other in succession'). explanatory context. Tautology can be extended to refer to a whole argument.

What is the opposite of tautology?

tautology. Antonyms: conciseness, brevity, laconism, compression. Synonyms: verbosity, redundancy, needless, repetition, pleonasm, reiteration.

What does it mean when a person is pedantic?

Pedantic is an insulting word used to describe someone who annoys others by correcting small errors, caring too much about minor details, or emphasizing their own expertise especially in some narrow or boring subject matter.