#callus.scar_tissue  bony tissue formed during the healing of a fractured bone
  subtype:  #chestnut.callus  a small horny callus on the inner surface of a horse's leg
  supertype:  #scar_tissue__scar__cicatrix__cicatrice  a mark left by the healing of injured tissue
     supertype:  #symptom  (medical) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease
        supertype:  #evidence.situation__grounds  your basis for belief or disbelief; knowledge on which to base belief; "the evidence that smoking causes lung cancer is very compelling"
           supertype:  pm#situation_playing_some_role  e.g., a causal situation
              supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
              supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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