#predicate_calculus__functional_calculus  a system of symbolic logic that represents individuals and predicates and quantification over individuals (as well as the relations between propositions)
  part:  #quantification.restriction
  supertype:  #symbolic_logic__mathematical_logic__formal_logic  any logical system that abstracts the form of statements away from their content in order to establish abstract criteria of consistency and validity
     supertype:  #system_of_logic__logic__logical_system__logicalsystem  a system of reasoning
        supertype:  #system_of_rules__system  a complex of methods or rules governing behavior; "they have to operate under a system they oppose"; "that language has a complex system for indicating gender"
           supertype:  #system  a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going"
              supertype:  #group__grouping  any number of entities (members) considered as a unit
                 supertype:  pm#collection  something gathering separated things (entities/situations)
                    supertype:  pm#divisible_entity__divisibleentity  many classifications under this category are application-dependant
                       supertype:  pm#entity  something that can be "involved" in a situation
                          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#divisible_thing__divisiblething
                          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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