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Where did the Errors Happen ?

  • False Accepts 6 – 2 = 4
  • (2 spammers got onto previously well-credentialed lists)
  • False Rejects 2 – 2 = 0
  • (2 “users” violated rules on said lists
  • and were summarily bounced)
  • Note that it's almost impossible to tell the difference between the two cases!
  • Arguable N+1 Accuracy for Markovian Filter:
  • 99.95%

    Note: