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( But) generally the idea is just to break the rules of the game, which normally say rival intel services dont cause physical harm, this kind of thing meets the letter of that, it doesnt technically get physical, but it breaks the norm of behavior because it seems to cause pretty severe harm. That destabilizes the game. People are worried, people dont perform as well because theyre sick, or theyre worried about being hurt and taking precautions against it, which may make them less effective.