Dani,
I wholeheartedly agree with your approach to open discussions and encouraging everyone to participate. However, emphasizing there are no right or wrong answers may be counterproductive when it comes to developing analytical skills. Analyses are often implemented in order to find an objective solution within a complex set of circumstances. There may be instances where philosophical analyses may not be looking for a right or wrong answer, so I would agree in that setting.
Dr. S. David Vaillancourt