Yosef Karo

“ This applies not only in a case where both of these cuts are circling the same spot, (but) even if the first cut you made up near the head and the second cut you made further down, its acceptable, whether it's one person who made a cut like this in two or three spots or if it was two people who slaughtered (in this manner) using two different knives, it is acceptable. ”

“ Thus (in a case) where if one started slaughtering in a spot (in the sign) that is whole, and one found their was a flaw in the (original) cut, and one cut it completely to a sizeable amount, it is acceptable. ”