I think that the central idea conveyed in the above excerpt is that the United States is willing to extend help to nations that are under communism. They are willing to extend help through financial aid and economic stability to ensure that the people under the beleaguered nations can also enjoy the freedom that citizens of the United States enjoy under a democratic government. However, the citizens of the United States must also be in agreement to the proposal of extending help to other nations.
Truman uses Logos and Pathos to persuade his audience to his way of thinking.
Logos refers to logic. Pathos refers to an appeal to emotions.
He uses the words "I believe..." to infer how passionate he is about his proposals. He also gives logical scenarios that supports his beliefs.
A question mark is the answer
