Three spies, suspected as double agents, speak as follows when questioned:Albert: "Bertie is a mole."Bertie: "Cedric is a mole."Cedric: "Bertie is lying."Assume that moles lie, other agents tell the truth, and there is just one mole among the three; determine:1.) Who is the mole?2.) If, on the other hand, there are two moles present, who are they?
is the mole. Both Albert and Cedric are telling the truth. Hence, when
Albert said, "Bertie is a mole," he was telling the truth, and giving
you the correct answer. When Bertie said, "Cedric is a mole," he was
lying, as he himself is a lying mole. When Cedric responded, "Bertie is
lying," he was telling the truth, and also affirming that Bertie was
lying.In the second case, if there were 2 moles, the
identifications would be a direct inverse. Both Albert and Cedric would
be moles, and Bertie would be telling the truth.