Unfortunately evidence to the contrary of a politician's current opinion does not undermine that opinion, rather it reinforces it. And adding more contrary evidence only serves to entrench them further in their original opinion.
Such was proven in a large sample of Danish politicians. One might have hoped that the Danes might have been more enlightened as a nation, but I suspect British and Scottish politicians will be equally resistant to facts.
The researchers conclude with some questions:
First, why does adding more evidence increase the impact of attitudes? Secondly, if increasing the amount of evidence does not reduce the impact of attitudes, how can we then reduce it? Thirdly, how can we ensure nuanced interpretations of evidence regardless of prior attitudes and beliefs?
Sadly they do not provide answers to this!
Robert