Page History

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• some hits are recorded from 'live' data at the time the messages were received, not post-facto testing (using 'mass-check --reuse')
• there were 9 people contributing their hit data, from a variety of geographical locations and organisational types
• Wiki Markupboth \["Ham"\] and \["Spam"\] hitrates are measured, and the corpora were hand-verified in advance
• the corpora use (relatively) fresh mail, received between January 2004 and July 2005
  

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