Take the following as truth: The region that would become Poland, a great plain sandwiched between the Vistula and Odra rivers, has been inhabited since the Stone Age by migratory tribal peoples among them Celts, Balts, Huns, Slavs and Mongols.
Then the following statement: "The Slavs have lived in Poland for longer than anyone else." is true, false, or inconclusive?
Answer: Inconclusive