Topic Sentence 1: First, the argument is based on a gratuitous assumption that students throughout the country must perceive economics as having the best job prospects because economics is the most popular major at Argent University.

 Topic Sentence 2: Second, the arguer overemphasizes the importance of economics major and ignores other possible factors that may contribute to the enrollment. Topic Sentence 3: Another assumption in short of legitimacy is the causal relationship claimed between publishing the accomplishments of Argent’s best-known economics professors as well as the success of its economics graduates in finding employment and the enrollment increase.