MISHNA: If the members of the Great Sanhedrin in Jerusalem are not familiar with that one who saw the new moon, i.e., that he is a valid witness, the members of his local court of twenty-three send another with him to testify about him. The mishna adds: Initially, the court would accept testimony to determine the start of the month from any person, as all are presumed to be qualified witnesses, absent any disqualifying factors. However, when the Boethusians, a sect whose members had their own opinions with regard to the establishment of the Festivals, corrupted the process by sending false witnesses to testify about the new moon, the Sages instituted that they would accept this testimony only from those men familiar to the Sanhedrin as valid witnesses. אִם אֵינָן מַכִּירִין אוֹתוֹ — מְשַׁלְּחִין עִמּוֹ אַחֵר לְהַעִידוֹ. בָּרִאשׁוֹנָה הָיוּ מְקַבְּלִין עֵדוּת הַחֹדֶשׁ מִכׇּל אָדָם. מִשֶּׁקִּלְקְלוּ הַבַּיְיתּוֹסִים, הִתְקִינוּ שֶׁלֹּא יְהוּ מְקַבְּלִין אֶלָּא מִן הַמַּכִּירִין.
GEMARA: The Gemara asks: What is the meaning of the statement in the mishna that another would be sent along to testify with regard to the qualification of the witness to the new moon? If it means that one other individual would be sent, גְּמָ׳ מַאי אַחֵר? חַד,