challenge: According to P. F. Strawson, what is the function of the phrase 'the current Emperor of Kentucky' in the sentence 'the current Emperor of Kentucky is gray'?
  
  A. To describe the physical appearance of the Emperor of Kentucky
  B. To assert the existence of the Emperor of Kentucky
  C. To use as a referring or denoting phrase
  D. To provide the location of the Emperor of Kentucky
  Answer: 