A paradox is in contrary to expectations. It may also refer to perceived opinion or existing belief. It is a statement which includes ultimate truth but is self-contradictory. To make the reader think in an innovative way, a paradox is used.
Few examples of paradox are:
“I can resist anything but temptation.” – Oscar Wilde
Therefore, best definition of paradox is the pairing of opposites.
The development, the happening, the incident, the occurrence, the situation. The affair, the encounter, the meeting, the moment. the episode, the problem and solution. Others have mentioned these or their ilk: the chapter, the passage, the story, the period, the attack, the bout, the installment, the phase.