At the risk of stirring up a hornet's net. :)
Yes, it's the JG again and apparently contradictory asserts about its status in MMT. It's short.
Read it at Modern Monetary Realism
Does Anyone Actually Know What MMT is?
by Cullen Roche
While the post is short, the comments bring out the understanding, or misunderstanding as the case may be, about the MMT and MMT in general upon which the MMR position is built as a counter to MMT that retains the monetary description (and claims to improve upon it) while abandoning much of MMT macro theory and policy formulations that follow from it. Cullen mounts arguments that attack not only the MMT JG, but also key MMT fundamentals such as a currency sovereign as monopolist.
Responses from both sides, and other sides, too, welcome here. "Let hundred flowers bloom."