How does a reader determine the credibility of a narrator?
1)by evaluating whether or not the narrator is actually the speaker
2)by determining whether or not the narrator is the same as the author
3)by examining the balance and consistency of information provided by the narrator
4)by judging if the narrator is realistic enough to trust

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.

karen blumenthal is the author of steve jobs: the man who thought different, and because of her work, she was a finalist in the 2013 yalsa award for excellence in nonfiction award.

it is significant that blumenthal interviewed several people who knew steve jobs personally because this allowed her to gain access to the industry. she has also stated that due to her work in the 1980s, she was able to get acquainted with the process of making computers and other technology, and was able to witness the progress different companies made and to appreciate apple's contribution to it. finally, this close connection with the industry means that her information is more credible than that of a complete outsider.