"I Spend a Fair Amount of Time Thinking About What Might Go Wrong"

The author is interviewing Walter Willet who "[Works] to improve public health by improving diets." He talks a lot about his life as a child and how him and his family became involved in this project.

The writer seems interested in just understanding what Willet and his family do. Willet explains the significance and benefits of his research; how it can improve the lives of others. That in itself is the argument Willet is trying to make. The author's intentions seem to be purely informational.

The writer- who is also conducting the interview, is mostly just asking questions to gain an understanding of Willet and his mission. The ideas mainly just build off of the information he gathers from Willet by asking questions and more follow up questions. The interview has continuity and flow because of the way and order in which the interviewer asks Willet questions.

The writer gathers his information directly from Willet by conducting an interview. Willet is the only source of information. The events or experiences described are those of Willet that happened to him and his family while growing up and building the foundation for his research; how it started, etc.

Honestly, the author did not really have an opportunity to do any "uncovering" of values in this piece. It was written purely as informational; to discuss Willet's life and mission, not much else.