Talmud su Ohalot 2:6

So we find that Rebbi Aqiba disagreed with the Sages and did not act upon his opinion. As we have stated there (Mishnah Ahilot 2:6): “Spine and skull from two dead bodies, a limb composed of limbs of two dead bodies, limbs taken from two living persons, Rebbi Aqiba declares them to be impure and the Sages declare them to be pure.”¹²⁷Purity and impurity mentioned here refer to transmission of impurity by a “tent”, since automatically everybody under the same roof with a corpse becomes impure; the “pure” bones mentioned here will still transmit impurity by touch. The conditions of impurity are spelled out in Ahilot 2:1. Flesh is causing impurity down to the volume of an olive but bones do so only if they are either the volume of a quarter qab (about .55 liter), most of the bones composing the skeleton in number or in importance, or skull and/or spine. [Whether one has to read שדרה וגלגולת as “skull and spine” or “skull or spine” is discussed inconclusively in Babli Nazir 52b ff.] We have stated:¹²⁸Tosephta Ahilot 4:2; there the full name Theodoros is given to the chief surgeon. The Tosephta starts: “Rebbi Yehudah said: Six cases did Rebbi Aqiba declare impure and he changed his opinion; it happened …”, and ends: “Rebbi Simeon said: Until the time of his death did Rebbi Aqiba maintain that it should be impure; whether he changed his opinion when dying I do not know.” This means that according to Rebbi Yehudah, the vote at Lod showed that Rebbi Aqiba changed his opinion but, according to Rebbi Simeon, Rebbi Aqiba did not change his opinion, only he did not want openly to defy the opinion of the majority. We assume that the Yerushalmi here accepts the opinion of Rebbi Simeon, otherwise there is no proof here. It follows that also when the Yerushalmi quotes the Tosephta, sometimes the proof comes from the omitted parts. “It happened that they brought a chest full of bones from Kefar Tabi¹²⁹Former Arab village Kafr Ṭab East of Lod. to Lod and deposited it in the open air [the courtyard] of the synagogue. Theodoros the physician entered and with him all physicians. Theodoros declared that there was no complete spine from one dead person and no complete skull from one dead person. They said: Since we have here some who declare this pure and others who declare it impure, let us vote upon it. They started with Rebbi Aqiba and he declared it to be pure. They said: Since you had declared it impure, but now you vote for it to be pure, it is pure.”