Remember back just a few months ago. We are in Britain. All the Remainers are jumping up and down about Brexit. We hardly see anything about it now as the UK moves towards a no deal with the EU. Times have overtaken all that non-event stuff. Now the developments are confounding the mainstream economists – again. There will be all sorts of reinventing history and ad hoc reasoning going on, but the latest data demonstrates quite clearly that what students are taught in mainstream macroeconomics provides no basis for an understanding of how the monetary system operates. All the predictions that a mainstream program would generate about the likely effects of current treasury and central bank behaviour would be wrong. Only MMT provides the body of knowledge that is requisite for understanding these trends.