Reference for Chullin 108:22

שב בני שב

This shows that R'Nahman is of the opinion that 'up to' is not inclusive.<span class="x" onmousemove="('comment',' For when our Mishnah says: UP TO AN ITALIAN ISSAR, It means that up to that size is a deficiency permitted, but the deficiency of an exact issar, being regarded as more than an issar, would render the animal trefah.');">⁸</span>

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