A paradox is similarly like a contradiction. A question or statement that cannot be comprehended nor can be an answered.

An example for a paradox can be like these statements:

1, A children ask the friend : "I'm a liar who tell lies all the time. Am I telling one now?"
2, A scientist told his crush about the Sun this, " A famous scientist once said that the Sun are particles, but Albert Einstein said that the Sun are waves too!"

Hope this helps. Godspeed.