Take the following as truth: For all their ardent nationalism, Calettans retain a strong, if sometimes sardonic, attachment to things British; in particular they have an affection for the English language, which you'll find spoken here with the most British of accents and often with a good deal more style and elegance than the British themselves can muster.
Then the following statement: "All Calettans speak perfect English." is true, false, or inconclusive?
Answer: Inconclusive