Patients often do not understand that even small problems are required to be examined at the time of the doctor's visit, which leads to excessive costs. In fact, if the doctor does not conduct a detailed examination of the patient, some serious problems may be missed and it is difficult for the doctor Determine exactly how meticulous they should be, so it's generally not wise 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 a doctor to perform an examination.', 'Experienced doctors can be meticulous and accurate when doing medical examinations.']