The number of people found to have violated academic norms in their graduation thesis in a certain university has increased significantly in the past 10 years, which indicates that the quality of contemporary college students in academic ethics is getting worse. Which of the following, if true, would significantly weaken the above conclusion? ['The power of the Internet has brought great convenience to academic misconduct.', 'Colleges and universities do not educate college students on academic ethics.', 'The number of undergraduate graduates has increased significantly in the past 10 years.', 'Graduation thesis of 30 undergraduates is still rated as the provincial excellent thesis.']