The best replacement for watson is ken jennings.

The best alternatives to watson are rated as following:
★★★★★  ken jennings
★★★★  jeopardy
★★★★  skinner
★★★  blunt
★★★  kristen stewart
★★★  mallinckrodt
★★★  google
★★★  jennings
★★  roberts
★★  wolfram alpha
★  ken
★  siri
★  samms
★  emily browning
★  katie leung
★  deep blue
★  thompson
★  emma roberts
★  boars head
★  emma stone
★  robson
★  qualitest
★  steve elkington
  jennings jeopardy
  nicklaus
  legend
  mallinckrodt hydrocodone
  jeopardy champions
  crick
  kite
  amneal
  selena gomez
  jennifer lawrence
  mercer
  catone
  jeopardy contestants
  jack nicklaus
  chris eubank
  cooley
  eubank
  bonnie wright
  stanislav nedkov
  pavlov
  freud
  jojo

Your alternative for watson is not listed? Suggest!
Speaking about watson, one probably shouldn't forget about excuses.

Other search terms related to watson and their ratings are:
★★★★★ excuses
★★★★ daniel radcliffe
★★ rupert grint
★★ tom felton
daniel
daniel radcliffe pictures
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Google Trends

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