Answer:
First, it is important to awknowledge both sides and ensure that there is no biased. You need to make sure both sides know they are being taken seriously anf tat their opinions are valid. Then in a calm mannor they need to make clear to eachother that they have to agree with eachother, but that they can respect the fact that everyone is entitled to their own thoughts,beliefs etc. and not everyone is always on the same page.
