Relation pm#irreflexive_relation__irreflexiverelation (?,?)  this category only serves structuration purposes: it is instance of pm#irreflexive_relation_type which is not instance of pm#class_of_inheritable_relation_type
  subtype:  pm#asymmetric_relation  sumo#successor_attribute_closure  pm#different  pm#inverse  sumo#less_than  sumo#greater_than  sumo#increases_likelihood  sumo#decreases_likelihood  sumo#inhibits  sumo#prevents  sumo#sub_proposition  sumo#sub_plan  sumo#larger  sumo#smaller  sumo#starts  sumo#finishes  sumo#before  sumo#during  sumo#earlier  sumo#meets_spatially  sumo#overlaps_partially  sumo#superficial_part  sumo#connected_engineering_components  sumo#ancestor  sumo#sibling  sumo#brother  sumo#sister  sumo#spouse
  type:  pm#irreflexive_relation_type  r is irreflexive if r(?i,?i) holds for no value of ?i
  supertype:  pm#binary_relation_with_particular_mathematical_property (?,?)
     supertype:  pm#relation_with_particular_mathematical_property (*)
        supertype:  pm#relation_with_particular_property (*)  this rather fuzzy type permits to group categorization schemes less common than those covered by the previous sibling categories
           supertype:  pm#relation__related_thing__relatedthing___related_with (*)  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type


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