Study Bava Batra folio 165B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
with the Mishnah remains: Why does the Mishnah state that which is obvious, that a document with a single witness’s signature is not valid?
The Talmud answers that the Mishnah teaches us this: That the case of two witnesses signed on a tied document is similar to the case of one witness signed on an ordinary document: Just as there, in the case of a single witness signed on an ordinary document, the disqualification is by Torah law, so
Ameimar added: Know that the signature of one witness on a document and the oral testimony of one person about it can be combined into a single testimony, as the colleagues of the academy sent a question from there, i.e., Eretz Yisrael, to R' Yirmeya seeking clarification of a baraita. The baraita
The dilemma they posed to R' Yirmeya was this: In the case of a loan for which there is one witness in writing, signed on a promissory note, and one other witness who testifies to the loan orally, what is the halakha with regard to the possibility that the two of them will combine to testify as two
The dilemma is clarified: According to the opinion of the first tanna of the baraita, who engages in a dispute with R' Yehoshua ben Korḥa, you should not raise the dilemma, as according to his opinion there are situations where even two testimonies in writing or two oral testimonies are not combined