#appearance.internal_representation  a mental representation; "I tried to describe his appearance to the police"
  supertype:  #internal_representation__representation__mental_representation  a presentation to the mind in the form of an idea or image
  subtype:  #illusion__semblance  an erroneous mental representation
     subtype:  #phantom__apparition__shadow  something existing in perception only: "a ghostly apparition at midnight"
        subtype:  #unidentified_flying_object__UFO__flying_saucer  an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
        subtype:  #Flying_Dutchman.phantom__flyingdutchman  a phantom ship that is said to appear in storms near the Cape of Good Hope
        subtype:  #spook__ghost__shade__wraith__specter  a mental representation of some haunting experience; "he looked like he had seen a ghost"; "it aroused specters from his past"
     subtype:  #phantom_limb__phantomlimb  the illusion that a limb still exists after it has been amputated
  subtype:  #three-D__3-D__3D__3d  having a three-dimensional form or appearance: "aren't dreams always in 3-D?"
  subtype:  #front.appearance  the outward appearance of a person; "he put up a bold front"

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