In order to implement the best cooperation, when determining the composition of the players on a volleyball match, the three coaches A. B, and C expressed whether or not Xiao Wang and Xiao Li were on the court as follows: A: "Only Xiao Wang played, Xiao Li played. " B: "If Xiao Wang comes on, then Xiao Li comes on. " C: "or Xiao Wang comes on or Xiao Li comes on. ". Based on this, which of the following judgments is impossible to conclude? ['All three words are true.', 'All three words are false.', 'Three words, two false and one true.', 'The words of the three are true and false.']