#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"
  subtype:  #bed_check__bedcheck  a check that everyone is in bed by the time they should be
  subtype:  #crosscheck.verification  an instance of confirming something by considering information from several sources
  subtype:  #parity_check__redundant_check__redundantcheck__odd-even_check  a system of checking for errors in computer functioning
  subtype:  #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

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