Medical marijuana legislation passed its first hurdle Wednesday in Springfield. An Illinois House committee voted 4-to-3 to legalize the use of marijuana for medical purposes. You can read the full story here. Our City Room editor talked with two state lawmakers who are pro/con on the bill. So we have both of their arguments, in a new blog segment called “Thrust and Parry”. (Ed note: We haven’t had time to create a flashy graphic or intro video. Just pretend it’s here.) Let’s begin! PRO: Democrat Representative Lou Lang. link CON: Republican Representative Patricia Bellock. link