80. Patients often do not understand that even a small problem is required to do a lot of tests when they see a doctor, which leads to excessive costs. In fact, if the doctor does not conduct a detailed examination of the patient, it may miss some serious problems It is difficult to determine exactly how meticulous they should be, so it is generally unwise for patients to get medical examinations when they feel free of illness. Which of the following most severely weakened the above argument? ['In the early stages of some important diseases, although the patient does not feel unwell, the doctor can observe the symptoms with the help of the instrument.', 'Doctors have been reducing their time for medical examinations with reduced income.', 'Patients lacking medical expertise cannot judge to what degree of meticulousness it is appropriate for the doctor to perform the examination.', 'Experienced doctors can be meticulous and accurate when doing medical examinations.']