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define paradox.
a statement or proposition that, despite sound (or apparently sound) reasoning from acceptable premises, leads to a conclusion that seems senseless, logically unacceptable, or self-contradictory: a potentially serious conflict between quantum mechanics and the general theory of relativity known as the information paradox...
or!
a seemingly absurd or self-contradictory statement or proposition that when investigated or explained may prove to be well founded or true.