#first-order_correlation__firstordercorrelation  a partial correlation in which the effects of only one variable are removed (held constant)
  supertype:  partial_correlation__partialcorrelation  a correlation between two variables when the effects of one or more related variables are removed
     supertype:  correlational_statistics__correlation  a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
        supertype:  statistic  a datum that can be represented numerically
           supertype:  datum__data_point  an item of factual information derived from measurement or research
              supertype:  information  knowledge acquired through study or experience or instruction
                 supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
                    supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                       supertype:  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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