The technique used by Iago in speaking to Othello that helps to advance his plan is rhetorical question, imagery, and sarcasm.
The conversations referred to in the questions between Iago and Othello occur in the famous play Othello by William Shakespeare. In reference to Desdemona, Othello’s beautiful wife, Iago questions Othello and manipulates him to think the worst about Cassio and Desdemona (suggesting that they are having an affair). Then he uses words to add color and a picture, implying that he has to be correct. He uses sarcasm to create the assurances Othello needed to be duped. In the play, Iago is shown to be manipulative using his skills and his understanding of others’ perspectives to achieve his evil intentions.
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