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Nurul Izzah Anwar, an engineering major at a college in Malaysia ...

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184 Part 3 Prepar<strong>in</strong>g Content<br />

st<strong>at</strong>istics<br />

numerical facts<br />

assembled to present<br />

signific<strong>an</strong>t <strong>in</strong>form<strong>at</strong>ion<br />

about a subject<br />

hobgobl<strong>in</strong> of little m<strong>in</strong>ds.” With the misquot<strong>at</strong>ion, consistency itself is<br />

condemned, but with the correct quot<strong>at</strong>ion, only a foolish consistency<br />

is deemed stupid.<br />

Use testimony from unbiased sources. Ethical speakers avoid<br />

us<strong>in</strong>g sources th<strong>at</strong> are biased. Suppose you are research<strong>in</strong>g the question<br />

of whether polygraphs (lie detectors) are accur<strong>at</strong>e, <strong>an</strong>d you come across<br />

glow<strong>in</strong>g pro-polygraph st<strong>at</strong>ements by two “experts” who are on the payroll<br />

of a firm th<strong>at</strong> m<strong>an</strong>ufactures polygraph mach<strong>in</strong>es. Could you expect<br />

such sources to be unbiased? Of course not. They would probably lose<br />

their jobs if they said <strong>an</strong>yth<strong>in</strong>g neg<strong>at</strong>ive about the mach<strong>in</strong>es. Reject such<br />

“evidence” <strong>an</strong>d look <strong>in</strong>stead for st<strong>at</strong>ements by people who have no vested<br />

<strong>in</strong>terest <strong>in</strong> the issue.<br />

Use testimony from relev<strong>an</strong>t authorities. As part of your prespeech<br />

audience <strong>an</strong>alysis, ask yourself, “Wh<strong>at</strong> k<strong>in</strong>d of experts would this<br />

particular audience believe?” If you are speak<strong>in</strong>g on foreign policy, for<br />

example, <strong>an</strong>d you have a good quot<strong>at</strong>ion from a movie star, would your<br />

audience consider the star’s views irrelev<strong>an</strong>t? If so, quot<strong>in</strong>g the star might<br />

weaken, r<strong>at</strong>her th<strong>an</strong> strengthen, your case.<br />

St<strong>at</strong>e the credentials of your source. If you quote a famous person<br />

like Abraham L<strong>in</strong>coln, you don’t need to give <strong>an</strong>y background <strong>in</strong>form<strong>at</strong>ion<br />

about the person. But for authorities who are not well known, be<br />

sure to give some biographical d<strong>at</strong>a to establish their credibility. For example,<br />

“Jack Smithson, who spent 25 years as a research scientist for NASA,<br />

says th<strong>at</strong> . . .”<br />

St<strong>at</strong>istics<br />

For a speech expla<strong>in</strong><strong>in</strong>g the immense dist<strong>an</strong>ces of space, Paula Schiller<br />

beg<strong>an</strong> with some m<strong>in</strong>d-boggl<strong>in</strong>g facts:<br />

Proxima Centauri, the star th<strong>at</strong> is closest to our solar system, is only 4.28<br />

light years away. Th<strong>at</strong> doesn’t sound like a very gre<strong>at</strong> dist<strong>an</strong>ce, does it? Is<br />

there <strong>an</strong>y ch<strong>an</strong>ce th<strong>at</strong> we c<strong>an</strong> reach th<strong>at</strong> star—or one of its pl<strong>an</strong>ets—<strong>in</strong><br />

our lifetime? Before you start f<strong>an</strong>tasiz<strong>in</strong>g about be<strong>in</strong>g the first hum<strong>an</strong> to<br />

travel to our nearest star, consider this fact: if you traveled to Proxima Centauri<br />

<strong>in</strong> the fastest spacecraft now <strong>in</strong> existence, it would take you 40,000<br />

years to make the trip.<br />

Schiller was us<strong>in</strong>g st<strong>at</strong>istics, which are numerical ways of express<strong>in</strong>g<br />

<strong>in</strong>form<strong>at</strong>ion. As this example illustr<strong>at</strong>es, st<strong>at</strong>istics don’t have to be dry <strong>an</strong>d<br />

bor<strong>in</strong>g. They c<strong>an</strong> be made <strong>in</strong>terest<strong>in</strong>g <strong>an</strong>d even excit<strong>in</strong>g.<br />

St<strong>at</strong>istics c<strong>an</strong> be especially effective <strong>in</strong> persuad<strong>in</strong>g <strong>an</strong> audience to<br />

accept a particular po<strong>in</strong>t. In our society, people put a lot of trust <strong>in</strong> st<strong>at</strong>istics.<br />

If a television commercial says th<strong>at</strong> 78 percent of physici<strong>an</strong>s prefer<br />

Cure-All pa<strong>in</strong> reliever over all compet<strong>in</strong>g br<strong>an</strong>ds, m<strong>an</strong>y consumers will<br />

rush out to buy Cure-All.<br />

In a speech <strong>in</strong> which she tried to persuade her audience to drive<br />

their cars less <strong>an</strong>d walk more, Carol Morris w<strong>an</strong>ted to prove th<strong>at</strong> the<br />

fitness of Americ<strong>an</strong>s has been lessened by the automobile. She could

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