There is a difference between an opinion which accepts it may be mistaken but brings all the data in it can (such as forecasts and analyses and statements from businesses and other governments) in an attempt to be as confident of its correctness as possible, and an opinion which admits no doubt and offers no evidence.

Yes, and that is how I confirmed my belief that voting Leave was the best thing to do.
I imagine you would also say that that is how you decided to vote Remain.