Bava Batra

MISHNAH. [IF ONE SAYS, I SELL YOU THIS  BETH KOR] WITHIN ITS MARKS AND BOUNDARIES', THE SALE IS VALID [IF THE DIFFERENCE  IS] LESS THAN A SIXTH;  [IF IT AMOUNTS] TO A SIXTH, DEDUCTION  MUST BE MADE. GEMARA. It was stated: R. Huna said: [The law of] a sixth  is  like [that of] less than a sixth. Rab Judah said: [The law of] a sixth  is  like [that of] more than a sixth. According to R. Huna, [who] said [that the law of] a sixth is like [that of] less than a sixth, [the Tanna of our Mishnah] means to say thus: The sale is valid [in the case where the difference is] less than a sixth as well as [when it is exactly] a sixth.  [If it is] more than a sixth deduction is to be made. According to Rab Judah, [who] said [that the law of] a sixth is like [that of] more than a sixth, the Tanna means to say thus: The sale is valid [when the difference is] less than a sixth. [If it is] more than a sixth as well as [when it is exactly] a sixth,  deduction is to be made. An objection  was raised: [It has been taught:] [If one states, 'I sell you a field] within its marks and boundaries', [and it was found to contain] a sixth less, or more, [the case] is like [that of] judicial appraisement [and] the sale is valid. Now, surely, [in the case of] judicial appraisement  [the law of] a sixth [is the same] as [that of] more  than a sixth!  — R. Huna can reply to you.  'And according to your argument [is there here no difficulty]? Surely it is stated, [the sale is valid]!'  Hence, [this must be the explanation, the case is] like judicial appraisement [in one respect], and unlike judicial appraisement [in another]. [It is] like judicial appraisement [with respect] to the sixth,  and [it is] unlike judicial appraisement, for there  the purchase is cancelled, while here  it is valid. R. Papa bought a field from a certain person