1. A familiar Cretan sails to Greece and says to Greek men, who stand on the waterside: "All Cretans are liars." Did he say the truth or did he lie? 2. A week later, Cretan was sailing there again and said: "All Cretans are liars and all I say is the truth." Although the Greeks ashore hardly found out, what he said the first time, now they were absolutely puzzled.