For example when  foreign documents relating to professional conduct the opinions of experts not sealable on disputes of policy in professional  to etiquette  to elucidate the rules of a particular profession, English law, morals and probability of human nature and all our opinions of law is that  which  English law though they may prove the proper costs of particular legal proceedings, neither expert or ordinary witnesses may give their opinions upon matters of legal or moral obligations or general human nature or the manner in which other persons would probably act in the interests and my Lord this  director points at the policy  it is in fact the authority admits  which is  Mr Justice  then was.