Twenty years ago, Dr. Field, a noted anthropologist, visited the island of Tertia. Using an observation-centered approach to studying Tertian culture, he concluded from his observations that children in Tertia were reared by an entire village rather than

The argument, given that fact that Dr.Karp reached a different conclusion from Dr. Field, recommends that Dr.Karp's interview-centred method is more reliable than Dr. Field's obervation based method. A casual reading seems to be convincing, a closer inspection brings out some loopholes. Since the recommendation ignores number of factors and other interpretations of the data obtained.

First, the author claimed that Dr. Karp visited a group of children and conducted a interview with them. Without any details of the interview, Dr. Karp concluded that the children in Tertia were brought up by their biological parents, which was in contrasting to the Dr. Field's observation. The recommendation did not specify what questions Dr. Karp asked during the interview, what the answer that he obtained for each question was, as well as the children's reaction. To make the conclusion more convincing, the author need to provide more detailsThe children never seen their biological parents before, it is likely that they were curious about the questions that related to their parents. Furthermore, the author need to state whether there was third party at presence. If not, the truism of the interview is questionable as Dr. Karp might tempt the children to give the answer he wanted.

Second, Dr. Karp conducted the interview based on a group of children and assumed that the simple is representative. The recommendation should examplify whether Dr. Karp's interview-method also draw same solution with other groups. Becasue assuming that the group of children that Dr. Karp interviewed grew up with their parents, it is likely that other children might be brought up by villagers. And it would imply that the group of children was the exception and invalidate Dr.Karsp's conclusion.

In conclusion, the argument is based on unproved assumptions, unconvincing recommendations, as well as inaccurate data. Other than reaching a conclusion with subjective assumptions, author need to provide convincing evidence and explicit details of how they were obtained which is categorical to decide whether the recommendation is reliable.