Answer:
In Martin Luther King Jr.'s "I Have a Dream" speech, he uses both contradiction and antithesis to emphasize his message. One example of this is his use of a contradictory statement, when he says: "So even though we face the difficulties of today and tomorrow, I still have a dream." This statement creates a sense of tension, as it implies that even in the face of difficult times, King's dream will still come true.
King also uses antithesis, or the direct opposite of a statement, to make his point. For example, he says: "I have a dream that one day this nation will rise up and live out the true meaning of its creed: 'We hold these truths to be self-evident, that all men are created equal.'" This statement directly contrasts the inequality that African Americans faced during the time of the speech, emphasizing the need for change and justice.
Overall, King's use of both contradiction and antithesis in his speech effectively emphasizes his message of equality and justice for all.