Author John M. Barry, in The Great Influenza, claims that scientists must embrace uncertainty and doubt their ideas in order to be successful in their research. To support his claim, he first states that “uncertainty creates weakness”, then lists the traits required by scientists (including curiosity and creativity), and finally explains that experiments must be made to work by the investigator. The purpose of this is to further support his claim in order to encourage readers to embrace uncertainty because certainty creates something to lean on, while uncertainty forces one to manipulate experiments to produce answers. Barry adopts a formal tone to appeal to a worldwide audience, specifically those interested in scientific research, by using