On Level 1 we take into account all symptoms that don’t belong to, or are not common for, the physical pathology. When symptoms don’t belong to the pathology they belong to the patient. For instance: a patient says his vomiting is better at the seaside. Or he gets migraine from potatoes. This is uncommon and must be a symptom of the patient. If a patient says he can’t stand the light and wants to lie down in a dark room, it belongs to the pathology.
From this it follows that the common symptoms of the pathology won’t help us in prescribing a vital remedy because they are not sufficiently individualized.