Every person who enters into a learned profession undertakes to bring to the exercise of it a reasonable degree of care and skill. He does hot undertake, if he is an attorney, that at all events he shall gain his case nor does a surgeon undertake that he will perform a cure, nor does he undertake to use the highest degree of skill. There may be persons who have higher education and greater advantage than he has but he undertakes to bring a fair, reasonable and competent degree of skill.