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Mach scale

[mak]
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noun Psychology.
  1. a scale that measures how much deceit and manipulation one will approve or condone in order to achieve some end.
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Origin of Mach scale

1965–70; short for Machiavelli, perhaps with play on mach
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018