Bava Batra

said to another, 'I will sell you all the property of Bar Sisin's.'  There was a piece of land which was called Bar Sisin's, but the vendor said, 'This is not really the property of Bar Sisin though it is called Bar Sisin's.' The case was brought before R. Nahman, and he decided in favour of the purchaser. Said Raba to him: Is this a right decision? Does not the onus probandi always lie on the claimant? There is thus a contradiction between these two remarks of Raba, and also between the two rulings of R. Nahman.  Between the two remarks of Raba there is no contradiction. In the latter case the seller is in possession; in the former the purchaser is in possession.  Neither is there any contradiction between the two rulings of R. Nahman. [In the latter case,] since the seller professed to sell the property of Bar Sisin's and this land is called Bar Sisin's, it is for him to prove that it is not Bar Sisin's, but here let the occupier [in pleading presumptive right] be but treated as if he produced a document of sale,  in which case should we not say to him: 'Prove your document to be valid and you can remain in ownership of the property'? A certain man said to another, 'What right have you in this house?' He replied, 'I bought it from you and have had the use of it for the period of hazakah.' Said the other, 'I was abroad  all the time [and therefore did not know or protest].' 'But,' said the first, 'I have witnesses to prove that you used to come here for thirty days every year.' 'Those thirty days,' he replied, 'I was occupied with my business.' [On hearing of the case] Raba said: It is quite possible for a man to be fully occupied with his business for thirty days [and not to know that another has occupied his house]. A certain man said to another, 'What right have you on this land?' He replied, 'I bought it from so-and-so who told me that he had bought it from you.' Said the first, 'You admit then