Sebuah paradoks adalah sebuah pernyataan yang betul atau sekelompok pernyataan yang menuju ke sebuah kontradiksi atau ke sebuah situasi yang berlawanan dengan institusi. Biasanya, baik pernyataan dalam pertanyaan tidak termasuk kontradiksi,yang membingungkan. Kebiasaannya paradoks yang dikenal sering kali menuju ke peningkatan dalam sains, filsafat, dan matematika.
For example, consider a situation in which a father and his son are driving down the road. The car crashes into a tree and the father is killed. The boy is rushed to the nearest hospital where he is prepared for emergency surgery. On entering the surgery suite, the surgeon says, "I can't operate on this boy. He's my son."
The apparent paradox is caused by a hasty generalization, or you could say hasty genderalization; for if the surgeon is the boy's father, the statement cannot be true. The paradox is resolved if it is revealed that the surgeon is a woman, the boy's mother.
Another example :
Nobody goes to that restaurant, it's too crowded.
Don't go near the water until you've learned to swim.
The man who wrote suce a stupid sentence cannot write at all.
If you get this message, call me; if you don't, then don't worry about it.
If a person says about himself that he always lies, is that that the truth or a lie???