First thing to do is separate out disagreements on facts, from disagreements on predictions, to disagreements on predictions about interventions, to disagreements on preferences.
One thing to note about "experts". They may know their field, but statistical inference and decision theory are a part of most controversies, and next to no one knows that they are talking about there.
One thing to note about "experts". They may know their field
In a number of fields even this is dubious. In some fields the only apparent qualification for being an "expert" is to claim to be one to a reporter and then tell the reporter what he wants to hear.
For every controversial subject I've heard of, there are always numerous very smart experts on either side. So I'm curious how it is that rational non-experts come to believe one side or the other.
So, what are your meta-arguments for going with one side or the other for any given controversial subject on which you have an opinion?