Consider some arbitrary machine M:
  Either: M is consistent,
  In which case, by Gödelâs theorem there will be a sentence that humans recognise as true but that M can't prove. So, we can do something that machine M can't.
  Or, M is not consistent
  In which case, M can't be a mind because minds must be consistent systems.
  In either case, the machine can't be a mind.
  John Lucas (1961).  |