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1/ I just read arxiv.org/pdf/1905.11374… and I agree with @suchisaria. Anyone concerned with stability (or invariance) should start with this paper to get a definition of we are looking for and why. Arjovsky etal paper should be read with this perspective in mind, as an attempt to
2/ secure this sort of stability w/o having a model, but having a collection of varying datasets instead. The former informs us when the latter's attempts will succeed or fail. It is appropriate here to repeat my old slogan: "It is only by taking models seriously that we learn
3/ when they are not needed". I wish I could quote from Aristotle but, somehow, the Greeks did not argue with their Babylonian rivals, the curve-fitters. They just went ahead and measured the radius of the earth AS IF their model was correct, and the earth was round. #Bookofwhy
