Final answer:
The purpose of Gladwell in the last part of the essay must be assessed by identifying the intended impact on the reader and the effectiveness of the argument presented, which may include persuading or informing them. The use of rhetorical strategies and the support of the thesis with reasoning are crucial to achieving this purpose.
Step-by-step explanation:
Analyzing the purpose of Gladwell in the last part of the essay involves examining how he intends to influence the reader and what techniques he uses to achieve this goal. The purpose could be to persuade, inform, entertain, describe, or explain. Gladwell's achievement of this purpose could involve various rhetorical strategies, such as metaphor or reflection (as seen in Trumbore's use) to underline the main points, or the establishment of a conflict which adds narrative tension, like in the Mark Twain excerpt.
Additionally, examining the purpose also requires us to consider whether the author wants the audience to take a specific action or to consider a particular point of view. This could be reflected in how Gladwell wraps up his essay, whether his conclusion reaffirms his thesis or presents it in a new light. Lastly, determining if the author's thesis is supported with sufficient reasoning is essential. This can involve looking at the use of evidence, the quality of the arguments made throughout, and how it all culminates in the final part of the essay. The effectiveness of the argument in the conclusion is a telltale sign of whether the purpose is achieved.