Premise: Moscow is the capital and most populous city of Russia , with 13.2 million residents within the city limits and 17.8 million within the urban area . The city has served as the capital of a progression of states , from the medieval Grand Duchy of Moscow and the subsequent Tsardom of Russia to the Russian Empire to the Soviet Union and the contemporary Russian Federation .
Hypothesis: Moscow is not the capital of Russia.
Label: CONTRADICTION