text: The existence of the hard problem is disputed. It has been accepted by some philosophers of mind such as 
  Joseph Levine,[10] Colin McGinn,[11] and Ned Block[12] and cognitive neuroscientists such as Francisco 
  Varela,[13] Giulio Tononi,[14][15] and Christof Koch.[14][15] On the other hand, its existence is denied by 
  other philosophers of mind, such as Daniel Dennett,[16] Massimo Pigliucci,[17] Thomas Metzinger, 
  Patricia Churchland,[18] and Keith Frankish,[19] and by cognitive neuroscientists such as Stanislas 
  Dehaene,[20] Bernard Baars,[21] Anil Seth,[22] and Antonio Damasio.[23] Clinical neurologist and skeptic 