Definition of paradoxes:
(n) :
An apparently self-contradictory statement, which can only be true if it is false, and vice versa.
(n) :
A counterintuitive conclusion or outcome.
(n) :
A claim that two apparently contradictory ideas are true.
(n) :
A person or thing having contradictory properties.
(n) :
A thing involving contradictory yet interrelated elements that exist simultaneously and persist over time.
(n) :
An unanswerable question or difficult puzzle, particularly one which leads to a deeper truth.