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   purpose of wiki
       1 study logic
       2 study how to investigate 
       3 study how to check true or not

   contents of wiki
       1 theory to prove
       2 theory to solve
       3 theory to search information

   why these info important ?
   = we should share, how to solve way. 
     because Total solve speed VS Total problem increase speed, in team

    only with logic knowledge, we cant solve problems 
       1 knowledges, before learn logics
       2 knowledges of danger event, in info management