The shooting in the Aurora, Colorado, movie theater has incited the usual debate over guns. One side says tighter gun restrictions could have prevented the horrible incident that night. The other responds that more guns in the hands of law-abiding people might have prevented it. However one comes down on this issue, writes Sheldon Richman, we should understand that it is not relevant to the gun-policy question. Even if there was no chance of stopping Holmes, that would not justify restricting law-abiding people from carrying handguns.