Sentence:  How quaint the ways of <WSD>Paradox</WSD>! / At common sense she gaily mocks! / Though counting in the usual way years twenty-one I've been alive, / Yet reck'ning by my natal day, / Yet reck'ning by my natal day, / I am a little boy of five! 
Meaning of the word marked with <WSD> tags:  A claim that two apparently contradictory ideas are true.(t)