All play and no work makes Paul Krugman a tinfoil hat conspiracy theorist.
What is Krugman's implicit assumption in the above tweet? That 9/11 was a false flag operation? That Donald J. Trump is not merely an untrustworthy demagogue but a ticking time-bomb? Can you see why implicit assumptions attributed to someone by somebody else are not valid?
Nearly 20 years ago, in an essay titled The Accidental Theorist, Krugman wrote:
Greider's theorizing is all the more speculative and simplistic because he is an accidental theorist, a theorist despite himself--because he and his unwary readers imagine that his conclusions simply emerge from the facts, unaware that they are driven by implicit assumptions that could not survive the light of day.Greider's "accidental theory" was the infamous lump of labor fallacy -- the supposed implicit assumption that "there is a fixed amount of work to be done in the world, so any increase in the amount each worker can produce reduces the number of available jobs."