Jonathan Chait's description of conservative economic reasoning is equally true of "gun rights" reasoning: "It begins with the conclusion and marches back through the premises."

In the delusional world of the NRA's leaders, people can be divided into good guys and bad -- and the good guys never commit violent acts. In that world it follows that we should simply arm the good guys so they can shoot back at the bad guys. For the NRA, this "logic" applies just as well to teenagers as to adults. Back on planet Earth, we understand that far too many 18 year olds who appear to be "good" actually will do some very bad things, and creating a constitutional right for teenagers to carry concealed weapons is nothing but lunacy.