Gao Shuan suffers from pseudomyopia. In order to restore his vision to a normal state, Doctor Li asked Gao Shuan to stop playing online games. To make Dr. Lee's request convincing, which of the following must be assumed? ['Pseudomyopia patients play online games, which will seriously affect their vision to return to a normal state.', 'Playing online games is the main cause of false myopia.', 'Doctor Li has rich experience and he cured more than 90% of patients with pseudomyopia who came to the clinic.', 'If myopia is not relieved in time, it will lead to true myopia.']