He is a lawyer, and most lawyers would advise their clients that the less they say, the better. Your example would lead to a neat follow-up question, "Who advis

He is a lawyer, and most lawyers would advise their clients that the less they say, the better. Your example would lead to a neat follow-up question, "Who advised you?", which -- according to the document you linked -- might be considered legal grounds for a non-routine search! The legal arena takes rationality and the rules of debate to their most absurd possible conclusions, and therefore doesn't work in ways that you or I would consider intuitive. Or, more succintly: politeness could land you in court.