owl#nothing__impossibility___absurdity__absurdity___bottom_type__bottomtype  the type of logically impossible objects (not of imaginary objects such as unicorns); this type cannot have any instance or subtype
  closed_exclusion:  pm#thing
  equal:  kif#bottom (pm)  sowa#absurdity (pm)  daml#empty (owl)

No statement uses or specializes owl#nothing; click here to add one.