The Sanhedrin deliberated on the susceptibility to Levitical uncleanness of an akhnai-oven. The purpose is the purification of pollution or sins (tsumi) and uncleanness (kegare). Priests were particularly enjoined to avoid uncleanness. Great Purification&colon; held on July 31st and December 31st to purify ourselves of daily uncleanness. Persons suffering from corpse uncleanness were not allowed to enter the inner court. Where these are equally divided the presumption of uncleanness will prevail. The Mishnah describes several grades of uncleanness. Reza Shah prohibited mass conversion of Jews and eliminated the concept of uncleanness of non-Muslims. She feels a deep sense of shame at her "uncleanness". In the Hebrew Bible, uncleanness has a variety of associations.