Texas A&M pays its faculty lower salaries than its competitor. Texas A&M is slightly older than University of Texas. Texas A&M used to be seven rankings behind University of Texas. There has been a decrease in the department staff since the added faculty.
Professor: This year, Texas A&M University has added to its faculty in the English department in order to escalate its rating in the World University Rankings by Subject. However, this obviously has not worked out too well for the department. The English department is still two rankings below its biggest rivalry, University of Texas.
Which of the following, if true, most seriously weakens the professor's conclusion?