As many mainstream macroeconomics try to reinvent themselves after their reputations were trashed during and in the aftermath of the GFC, some are still trying to stay relevant by recycling the usual trash about deficits, public debt and bond yields that defines the New Keynesian orthodoxy in macroeconomics. That approach has been emphatically exposed as fake knowledge by the fact that none of the predictions that can be derived from that framework have proven to be accurate. On December 9, 2019, the UK Guardian took a rest from imputing anti-semitist motives to Jeremy Corbyn and published a sort of dinosauric-type article from Kenneth Rogoff – Public borrowing is cheap but ramping up debt is not without risk. Yes, the same character that claimed during the crisis that there was a public debt threshold of 90 per cent of GDP, beyond which, governments would face insolvency. When it was discovered the spreadsheet they had used to come up with that conclusion had been incompetently (or fraudulently) manipulated and that the actual data did not show anything of the sort, Rogoff should have slunked off and shut his mouth forever. But that is not the way these characters operate. Memory is short. Their position as an agent for their elites is well paid. And so they keep recycling the nonsense. Eventually, their influence will decline. But as Max Planck noted in 1948 “Die Wahrheit triumphiert nie, ihre Gegner sterben nur aus”, which has been reduced to ‘science advances one funeral at a time’, which is not a verbatim translation but an accurate depiction of how change is slow to come to the academy.