Reference for Niddah 4:20

התם איכא תרתי לריעותא הכא איכא חדא לריעותא

On the contrary! Why not postulate that the ritual bath shall be regarded as being in its presumptive status of validity and assume that it was not lacking?<span class="x" onmousemove="('comment',' At the time of the immersion. ');">¹⁹</span>

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