Reference for Keritot 24:29

מודה רבי מאיר לחכמים שאם אמרו לו שנים

and the law is in accordance with Rabban Gamaliel, who holds awareness is of no avail with regard to half-sizes;<span class="x" onmousemove="('comment',' I.e., half-sizes may be combined one with the other even if eaten in two spells of unawareness.');">¹⁸</span>

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