Responsa for Bava Batra 47:7

דהא אשה דכי דלתות מדינה נעולות דמיא ואפי' הכי קא אזלינן בתר רובא

Raba remarked: From this statement of R. Hiyya three lessons may be derived. One is [that where we have to choose between] 'majority' and 'nearness', we decide on the ground of 'majority'.<span class="x" onmousemove="('comment',' Since if we decided that the blood belongs to that category to which it is nearest, it would not render the woman liable to a sin-offering nor necessitate the burning of terumah. ');">⁹</span> The second is that the rule of 'majority' derives its warrant from the Scripture. The third is that R. Zera was right when he laid down that [in the case of a piece of meat] we decide on the ground of 'majority' even though the town gates are closed,<span class="x" onmousemove="('comment',' If there are ten butchers' shops in a town of which nine sell 'kosher' meat and the tenth 'trefa', then if a piece of meat is found near the one which sells 'trefa' meat we still say, on the ground of 'majority', it is 'kosher', and this (R. Zera maintains) not only if the town gates are open so that there is a possibility of it having been brought in by Jews from outside, forming a 'majority', but even if they are closed, i.e., even if there is only one 'majority' and not two. ');">¹⁰</span>

Teshuvot Maharam