Relation sumo#independent_probability__independentprobability (sumo#formula,sumo#formula)  the probabilities of the formulas being true are independent
  type:  pm#binary_predicate_type  the class of predicates relating two items - its valence is two
  type:  pm#symmetric_relation_type  when (?REL ?INST1 ?INST2) implies (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2
  type:  pm#probability_relation_type  the class of relations that permit assessment of the probability of an event or situation
  supertype:  pm#probability_relation__probabilityrelation (sumo#formula,?)
     supertype:  pm#relation_from_description (pm#description,*)
        supertype:  pm#relation_from_description_content/medium/container (pm#description_content/medium/container,*)
           supertype:  pm#relation_from/to_thing_of_common_kind (*)  this type permits to categorize relations according to their signatures and hence offers (i) a concise way to set essential exclusion relations, and (ii) a systematic and easy-to-follow categorization
              >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type
  supertype:  pm#symmetric_relation__symmetricrelation (?,?)  this category only serves structuration purposes: it is instance of pm#symmetric_relation_type which is not instance of pm#class_of_inheritable_relation_type
     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
              >part of:  pm#relation__related_thing__relatedthing___related_with  type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type