名词

1. 自相矛盾；有矛盾特点的情况
You describe a situation as a paradox when it involves two or more facts or qualities which seem to contradict each other.

2. 悖论；自相矛盾的说法；似矛盾而（可能）正确的说法
A paradox is a statement in which it seems that if one part of it is true, the other part of it cannot be true.

1. (logic) a statement that contradicts itself

e.g. `I always lie' is a paradox because if it is true it must be false