Final answer:
A central belief of Islam that is not shared by Judaism or Christianity is the finality of prophethood.
Step-by-step explanation:
A central belief of Islam that is not shared by Judaism or Christianity is the belief in the finality of prophethood. Muslims believe that Muhammad is the last and final prophet sent by God, and that there will be no further prophets after him. This belief is not held in Judaism, which recognizes prophets such as Moses and Isaiah, or in Christianity which recognizes Jesus as the son of God and the Messiah.
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