A contradiction occurs when an argument contains elements that are opposite or that are in opposition. For instance: Juan is my father, but he is not my father. If one of the terms is true, therefore the other is false (or vice versa), since a thing cannot be both true and false.
The word contradiction comes from the Latin term contradictory, word composed of: against (“Opposition”) and I will say (“tell”).
Principle of non-contradiction
The principle of non-contradiction is a principle of logic and philosophy according to which: “it is impossible for something to be and not to be at the same time and in the same sense.” For instance: it is not possible for an object to be a tree and not be, at the same time, a tree.
The origin of this principle was formulated by the Greek philosopher, Parmenides, who stated: “what is is and what is not is not”. For his part, Aristotle, in his Metaphysics, formulated: “it is impossible that, at the same time and under the same relationship, the same attribute occurs and does not occur in the same subject.”
Examples of contradictions
- Life is long and it is short.
- I’m seeing you but I don’t see you.
- I love her and hate her at the same time.
- The rain makes me wet but I’m not wet.
- Never say Never.
- The car is white, but black.
- I bought the ticket, and I didn’t buy the ticket.
- Now it rains and it does not rain.
- Today is Monday and Thursday.
- It is not blue and red, it is red and blue.
- There is a lot of fog and excellent visibility.
- The task is easy, and very difficult.
- Lions are not orange, they are orange.
- The car is green, and the car is not green.
- To be and not to be.
- I crossed the street but did not cross the street.
- It is not expensive, it costs a lot of money.
- More examples in: Sentences without coherence