For the source text click/tap here: Bava Batra 169
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With regard to deeds of buying and selling land, the court may write a replacement document, excluding the guarantee that was in the first document that if the field is repossessed the seller will compensate the purchaser for his loss.
Rafram says: This statement of Rav Naḥman serves to say that the omission of the guarantee of the sale from a document is a scribal error. That is, it is assumed that when one purchases land he expects to have his purchase guaranteed, and that if such a clause is not stated in the document it is presumed to be a mere scribal oversight, and a guarantee is in effect.
We explore tribal errors in bible and talmud.