Webster’s Ninth New Collegiate Dictionary (1992) a contradiction is defined as:
- a proposition, statement, or phrase that asserts or implies both the truth and falsity of something;
- logical incongruity;
- a situation in which inherent factors, actions, or propositions are inconsistent or contrary to one another.
In the Longman Dictionary, Major New edition (1991), a contradiction is defined as:
- opposition of factors inherent in a system or situation
- a proposition so related to another that if one is true the other must be false and if one is false the other must be true.