Readers can tell Tuchman is writing with objectivity in paragraph 3 because she does not include opinions or interpretations, but focuses on describing facts.
Objectivity refers to an author's ability or choice to write in an unbiased manner, that is, without expressing her own opinions or interpretations. One way to be objective is by simply stating or describing facts.
That is how readers can tell Barbara Tuchman is writing with objectivity in paragraph 3. Tuchman is a historical writer, and she focuses on describing facts. That is why paragraph 3 is unbiased.
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