Simon I guess you know by now that you cannot reason with someone while they have been drinking...Your dad is no exception...It will only wind up with you getting into an argument...Have you ever heard of alanon or alateen? (spelled wrong I think)...anyhow it is for children of alcoholics...they may be able to teach you some strategies or just be there to help you cope with the life you are living with an alcoholic...please look into it...It may truly help you! They have regular weekly meetings like alcohoic anonymous...only it is for the abused of alcoholics...try it...It won't hurt!!