#checksum  a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage
  supertype:  verification__confirmation__check__substantiation  additional proof that something that was believed is true; "fossils provided further confirmation of the evolutionary theory"
     supertype:  cogent_evidence__proof  any factual evidence that helps to establish the truth of something; "if you have any proof for what you say, now is the time to produce it"
        supertype:  evidence.situation__grounds  your basis for belief or disbelief; knowledge on which to base belief; "the evidence that smoking causes lung cancer is very compelling"
           supertype:  situation_playing_some_role  e.g., a causal situation
              supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                 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
              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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