text: **Chalmers' formulation**
  
  . . .even when we have explained the performance of all the cognitive and behavioral functions 
  in the vicinity of experience—perceptual discrimination, categorization, internal access, verbal 
  report—there may still remain a further unanswered question:*Why is the performance of these*
  *functions accompanied by experience?*
  
  — David Chalmers, Facing up to the problem of consciousness 
  
  The problems of consciousness, Chalmers argues, are of two kinds: the*easy problems*and the*hard*
  *problem*. 