Reference for Niddah 120:2

מכל מקום קשיא

while the latter applies to future uncleanness.)2 At all events does not a difficulty arise?<span class="x" onmousemove="('comment',' Apparently it does; for since, according to the Baraitha cited, R. Simeon b. Gamaliel allows the attribution how could R. Judah b. Liwai maintain that he does not. ');">³</span>

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