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Tautology vs Circularity - What's the difference?

tautology | circularity |

In uncountable|lang=en terms the difference between tautology and circularity

is that tautology is (uncountable) redundant use of words while circularity is (uncountable) the state of being circular.

In countable|lang=en terms the difference between tautology and circularity

is that tautology is (countable) an expression that features tautology while circularity is (countable) a circular object, form or argument.

As nouns the difference between tautology and circularity

is that tautology is (uncountable) redundant use of words while circularity is (uncountable) the state of being circular.

tautology

English

Noun

  • (uncountable) redundant use of words
    • It is tautology to say, "Forward Planning".
  • (countable) An expression that features tautology.
    • ''The expression "raze to the ground" is a tautology, since the word "raze" includes the notion "to the ground".
  • * 1946 , Bertrand Russell, History of Western Philosophy :
    • Pure mathematics consists of tautologies , analogous to ‘men are men’, but usually more complicated.
  • (countable, logic) A statement that is true for all values of its variables
    • Given a Boolean A, "A OR (NOT A)" is a tautology .
    A logical statement which is neither a tautology nor a contradiction is a contingency.
    A tautology''' can be verified by constructing a truth tree for its negation: if all of the leaf nodes of such truth tree end in X's, then the original (pre-negated) formula is a '''tautology .

    Antonyms

    * contradiction in terms * (in logic) contradiction * (literary) oxymoron

    Coordinate terms

    * (in logic) contingency, contradiction

    Derived terms

    * tautological * tautologically * tautologise * tautologist * tautologous * tautologously

    See also

    * pleonasm * redundancy * (Tautology) English words suffixed with -ology

    circularity

    English

    Noun

  • (uncountable) The state of being circular.
  • (countable) A circular object, form or argument.

    • References

    * (EtymOnLine)