OK. I'll try again. There is no deterrent to a housebreaker if he knows that there is an infinitesimal chance that his victim will be armed. It would be like being deterred from leaving your house for fear of being struck by a meteorite. Gun ownership in Britain was not a deterrent, because there were only a few thousand gun-owners in a country of nearly 60 million people. Get it? Shall I say it again?