Question: Did the leader of the Reformation in Switzerland deny the necessity of baptism?, Answer:Yes, Description of Baptism: Christian rite of admission and adoption, almost invariably with the use of water, Fact1:  Huldrych Zwingli  denied necessity of baptism., Fact2:  Huldrych Zwingli  was a leader of the Reformation in Switzerland.
Step1: Who was the leader of the Reformation in Switzerland?, Step2: Did #1 deny the necessity of baptism?, Wikipedia page for step 1: Huldrych Zwingli, Wikipedia page for step 2: Huldrych Zwingli, not_definitive_answer: False, incorrect_answer: False