text: The Turing test can provide some 
  evidence of intelligence, but it 
  penalizes non-human intelligent 
  behavior.[361] 
  
  McCarthy defines intelligence as "the computational part of the 
  ability to achieve goals in the world".[364] Another AI founder, 
  Marvin Minsky similarly describes it as "the ability to solve hard 
  problems".[365] The leading AI textbook defines it as the study of 
  agents that perceive their environment and take actions that maximize their chances of achieving defined 
  goals.[1] These definitions view intelligence in terms of well-defined problems with well-defined 
  solutions, where both the difficulty of the problem and the performance of the program are direct 
  measures of the "intelligence" of the machine—and no other philosophical discussion is required, or may 
  not even be possible. 
  
  Another definition has been adopted by Google,[366] a major practitioner in the field of AI. This definition 
  stipulates the ability of systems to synthesize information as the manifestation of intelligence, similar to 
  the way it is defined in biological intelligence. 