Learning curves: up and down, steep and shallow
Daniel Drezner, "Five thoughts about the firing of Rex Tillerson", WaPo 3/13/2018 [emphasis added]:
There is no signature idea or doctrine or accomplishment that Tillerson can point to as part of his legacy. He was woefully unprepared for the job on Day One and barely moved down the learning curve. His incompetence undercut his ability to advance any worthwhile policy instinct.
My reaction on reading this passage was that Drezner should have written that Tillerson "barely moved up the learning curve". As we'll see, this opposition in directional metaphors is apparently a cultural difference between psychology and economics, or maybe among a more complicated set of academic subgroups. And while I was looking into this issue of directionality, I was reminded of another curious quirk of learning-curve metaphors that I've been meaning to write about for a while, namely the inverted meaning of "steep".
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