"Posek (Hebrew: \u05E4\u05D5\u05E1\u05E7\u200E [po\u02C8seq], pl. Poskim, \u05E4\u05D5\u05E1\u05E7\u05D9\u05DD) is the term in Jewish law for \"decider\"\u2014a legal scholar who decides the Halakha in cases of law where previous authorities are inconclusive or in those situations where no halakhic precedent exists.The decision of a posek is known as a psak din or psak halakha (\"ruling of law\"; pl. piskei din, piskei halakha) or simply a \"psak\". In Hebrew, \u05E4\u05E1\u05E7 is the root implying to \"stop\" or \"cease\"\u2014the posek brings the process of legal debate to finality."@en . . .