“We’d like to waive the opening session.” As the mediator in personal-injury, professional liability and employment cases, I hear it time and again. The reasons vary: “We all know the case”; “Our time is limited so let’s just get right to the negotiations”; or “Last time I did an opening, it was a disaster.”Then there are the nonreason reasons: “I just never do openings”; or “I find openings counterproductive.”The author usually tries to …