They have no interest in common sense arguments. That is their problem.
When do you ever make a common sense argument? Seems to me since we can't stop these schools shootings it would be common sense to arm some people so they can stop the killers.
You can begin the common sense approach by getting rid of weapons like AR's, that kill people in mass, in a hurry, and were originally built exclusively for the military, not for civilian use. Don't believe me, do the research. Any weapon that can kill as many people like grenades, bazookas, and the like, as the AR can, should not be allowed on our streets. That's where your common sense lies. So, I just made a common sense argument. Now, refute it?