<prompt> The doctrine of res ipsa loquitur meansCommon knowledgeMedical maloccuranceFact speaks for itselfOral evidence  <response>: The doctrine of res ipsa loquitur It means the thing or fact speaks for itself.In a case of professional negligence of a physician, the patient need not prove negligence.It is applied when the following conditions are fulfilled :That is the absence of negligence the injury would not have occurred ordinarily.That the doctor had exclusive control over the injury-producing instrument or treatment.That the patient was not guilty of contributory negligence. 