The Bears never having fired a head coach during the regular season might offer the most compelling evidence to do so now, to try something different. If Fox’s firing is as inevitable Jan. 1 as it appeared after the Bears’ latest demoralizing loss, why not use the final month to let defensive coordinator Vic Fangio make his case as head coach? Why not devote December to getting in front of other teams that also might be pursuing Patriots coordinator Josh McDaniels, Eagles assistant John DeFilippo or any mystery candidates? Maybe Fox hasn’t stopped coaching the Bears, but so many dumb penalties and mental mistakes leave the impression that players have stopped responding.