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Autology vs Tautology - What's the difference?

autology | tautology |

As nouns the difference between autology and tautology

is that autology is the study of oneself while tautology is (uncountable) redundant use of words.

autology

English

Noun

  • the study of oneself

    • 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