different between contradiction vs duality

English

Etymology

Borrowed from Old French contradiction, from Latin contr?dicti?, from contr?d?c? (“speak against”).

Pronunciation

• (Received Pronunciation) IPA^(key): /?k?nt???d?k??n/
• (General American) IPA^(key): /?k??nt???d?k??n/
• Rhymes: -?k??n

Noun

contradiction (countable and uncountable, plural contradictions)

1. (countable, uncountable) The act of contradicting.

   His contradiction of the proposal was very interesting.

2. (countable) A statement that contradicts itself, i.e., a statement that claims that the same thing is true and that it is false at the same time and in the same senses of the terms.

   There is a contradiction in Clarence Page's statement that a woman should have the right to choose and decide for herself whether to have an abortion and at the same time she should not have that right.

   There is a contradiction in what you say: she can't be both married and single.

3. (countable) A logical inconsistency among two or more elements or propositions.

   Marx believed that the contradictions of capitalism would lead to socialism.

4. (logic, countable) A proposition that is false for all values of its propositional variables or Boolean atoms.

Synonyms

• (statement that contradicts itself): oxymoron
• (proposition that is false for all values of its variables): ?, ??, ?, ?, ?

Antonyms

• (proposition that is false for all values of its variables): tautology

Coordinate terms

• (proposition that is false for all values of its variables): contingency, tautology

Related terms

• contradict
• contradictory
• self-contradiction

Translations

French

Etymology

Borrowed from Latin contradictio, contradictionem.

Pronunciation

• IPA^(key): /k??.t?a.dik.sj??/

Noun

contradiction f (plural contradictions)

1. contradiction (clarification of this definition is needed)

Derived terms

• esprit de contradiction

Related terms

• contradictoire
• contredire

Further reading

• “contradiction” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

English

Etymology

From Latin du?lit?s.

dual +? -ity

Pronunciation

• IPA^(key): /d(j)u??æl?ti/
• Rhymes: -æl?ti

Noun

duality (countable and uncountable, plural dualities)

1. A classification into two subclasses or opposed parts.
2. (projective geometry) The interchangeability of points and planes.
3. (mathematics, physics) The mathematical equivalence of two seemingly different theoretical descriptions of a physical system.

Synonyms

• dichotomy

Derived terms

• wave-particle duality

Translations