#differentiation.discrimination__distinction  a discrimination between things as different and distinct; "it is necessary to make a distinction between love and infatuation"
  supertype:  discrimination__secernment  the cognitive process whereby two or more stimuli are distinguished
  subtype:  contradistinction  a distinction drawn on the basis of contrast; "sculpture in contradistinction to painting"
  subtype:  dividing_line__line__demarcation  a conceptual separation or demarcation: "there is a narrow line between sanity and insanity"
     subtype:  point_of_no_return__Rubicon  a line that when crossed permits of no return and typically results in irrevocable commitment
  subtype:  hairsplitting__word-splitting  making too fine distinctions of little importance; "they didn't take his hairsplitting seriously"

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