Patients often have so much respect for doctors and nursing staff that they remain silent even when they notice an obvious mistake. Example case: A 67-year-old cancer patient was to receive chemotherapy in a hospital. First he went to the oncologist’s office as usual and told him about his severe nausea after the last infusion of the cancer drug. The oncologist then decided that the dose for today’s visit should be halved. The patient went into the treatment room, the nurse showed him the infusion bag – on which the full dose of the chemotherapy drug was noted. Nevertheless, the man allowed the infusion to be put in without asking why he should now receive the full dose.