The attorneys defending Cook County’s stalled penny-an-ounce tax on sweetened beverages argued Friday that the Illinois Constitution’s tax-uniformity clause is not a “straightjacket” on taxing bodies and does not require “perfect rationality” in its taxing ordinance.Instead, Assistant State’s Attorney Kent S. Ray told Cook County Circuit Judge Daniel J. Kubasiak that the clause provides only a minimum standard of reasonableness between an ordinance’s different taxing …