Question: Would a duke hypothetically be subservient to a Tsar?, Answer:Yes, Description of Tsar: title given to a male monarch in Russia, Bulgaria and Serbia, Fact1: The Tsar was the highest ruler in several eastern countries., Fact2: A duke was a title given to important european nobles., Fact3: Dukes ranked below princes, kings, and queens., Fact4: Tsars were the equivalents of English Kings.
Step1: What is the equivalent of a Tsar in English hierarchy/royalty?, Step2: Do dukes rank below #1?, Wikipedia page for step 1: Tsar, Wikipedia page for step 2: Duke, not_definitive_answer: False, incorrect_answer: False