Read the following excerpt from President John F. Kennedy's "We Choose to Go to the Moon" speech. Then, answer the question that follows.
… we meet in an hour of change and challenge, in a decade of hope and fear, in an age of both knowledge and ignorance. The greater our knowledge increases, the greater our ignorance unfolds.
Which rhetorical device does Kennedy use to support his argument?
Antithesis: he is using contrasting ideas to emphasize the uncertainty of space exploration
Irony: he is saying the opposite of what he means about space exploration
Rhetorical question: he is stating something about space exploration in the form of a question
Zeugma: he is using figurative language to emphasize a literal and figurative meaning