1)Success is a test that reveals the presence of a hypothesis regarding defects
2)Role of a Tester is like a doctor who is in the process of building a diagnosis of a sick patient. A health care provider about possible disease hypothesis using their knowledge of possible diseases and symptoms of the patient
3)Examinations carried out in order to make the correct diagnosis. One could see the faulty software as the sick patient.
4)Testers and physicians should be knowledgeable about possible defects (the disease to develop hypotheses defects)