But it would seem that because of the necessarily delicate nature of the inquiry, to avoid disclosing what the statute forbids, the burden is overcome with slight evidence, and inferences and presumptions are freely indulged in aid of the privilege; for instance, where the physician was not permitted to answer whether he did converse with his patient about an injury, or whether he made an examination with reference to it, it was urged that the objection was prematurely made, but it was held that the fact that the patient consulted a physician on the occasion to which the inquiry related, when considered with the nature of the questions, justified the exclusion in the absence of other proof.[468] But the physician may testify that he did attend his patient as physician;[469] and he may answer the question whether the information was necessary to enable him to act in his professional capacity;[470] for while his testimony on that point is not conclusive, and the Court uses its own judgment in reaching a determination, his testimony is competent evidence.[471] He may also testify that a person was ill and was his patient, that he attended as physician, and he can state when he attended and how many times.[472] It has been said that where the evidence justifies the conclusion that information regarding the patient is acquired while attending in a professional capacity, it is not essential to show by formal proof that the information was necessary.[473] THE RIGHTS AND DUTIES OF THE PHYSICIAN WITH REFERENCE TO THE PRIVILEGE. The privilege established by law is a rule of evidence, and not a regulation of a physician’s general conduct outside of a proceeding in which rules of evidence are applicable.[474] The courts have, however, not hesitated to intimate that it is a physician’s duty to observe the same secrecy in his general walk and conversation.[475] The physician may testify as an expert on hypothetical questions submitted to him regarding facts which might be equally true of any other person than his patient, and excluding from his consideration privileged knowledge.[476] And he may also testify as to matters which came to his knowledge before or after or independent of his employment as physician,[477] or which were immaterial to his acting in a professional capacity, and as to which his patient could have had no reasonable ground for believing that they were necessarily disclosed in order that the physician might so act.[478] It is the patient’s privilege and not the physician’s; and, therefore, the physician is not absolutely incompetent as a witness, and has no right to refuse to testify.[479] But where he is a party he may object and then he will not be forced to disclose his patient’s confidence.[480]