A person commits robbery when he “knowingly takes property … from the person or presence of another by the use of force or by threatening the imminent use of force.” 720 ILCS 5/18-1(a). Robbery becomes “armed robbery” when that taking of property is perpetrated by an individual “armed with a dangerous weapon other than a firearm.” 720 ILCS 5/18-2(a)(1).So who decides what …