A - fact check all the facts upon which the "oppo" argument is built
B - discourse analysis and logical deconstruction
A - hard data (breaking down public statistics into plain language. Lay people are not trained at reading abstract representations such as table and charts and, obviously, not raw data)
B - Logical desconstruction: A = C "quod erat demonstrandum" (as we wanted to demonstrate). Plain language demonstration of logical falacies, not really rocket science.