Suppose you're writing a letter and you recall a word you'd like to use, but you don't know how it's spelled. if you wanted to look up the word in a dictionary. you should use any of the following techniques except

In paragraph 5, president obama remarks: “you know, when trayvon martin was first shot i said that this could have been my son. another way of saying that is trayvon martin could have been me 35 years ago.” how does president obama use rhetoric in this quote to contribute to the overall meaning of his speech?