SPRINGFIELD — Police powers. Enforceable contracts. Benefit reduction and impairment. The state’s top court will hear familiar positions on these matters March 11 when it listens to arguments regarding Illinois’ 2013 pension reform. But from Friday through Sunday, first at a Springfield hotel and on the final day at the Old Supreme Court in the Statehouse, college students who participated in this year’s Model Illinois Government moot court simulation presented their own take on a different …