Rif Gittin 10b {21b - 22b}

10b

{Gittin 21b}
Mishna:

אין כותבין במחובר לקרקע
כתבו על המחובר תלשו וחתמו ונתנו לה כשר
ר' יהודה פוסל עד שתהא כתיבתו וחתימתו בתלוש
רבי יהודה בן בתירה אומר אין כותבין לא על נייר מחוק ולא על הדיפתרא מפני שהוא יכול להזדייף
וחכמים מכשירין

[A GET] MUST NOT BE WRITTEN ON SOMETHING STILL ATTACHED TO THE SOIL.
IF, HOWEVER, IT WAS WRITTEN ON SOMETHING STILL ATTACHED TO THE SOIL AND THEN DETACHED AND SIGNED AND GIVEN TO THE WIFE, IT IS VALID.
RABBI YEHUDA DECLARES IT INVALID UNLESS IT IS BOTH WRITTEN AND SIGNED ON SOMETHING NOT ATTACHED TO THE SOIL.
RABBI YEHUDA BEN BETEIRA SAYS THAT [A GET] MUST NOT BE WRITTEN ON A SHEET FROM WHICH WRITING HAS BEEN ERASED, NOR ON DIFTERA {=a certain kind of skin}, BECAUSE WRITING ON IT CAN BE ALTERED [WITHOUT BEING NOTICEABLE].
THE SAGES, HOWEVER, DECLARE SUCH A GET VALID.

Gemara:

כתבו על המחובר
והא אמרת רישא אין כותבין
אמר רב יהודה אמר שמואל והוא ששייר מקום התורף
וכן אמר רבה בר בר חנה אמר רבי יוחנן והוא ששייר מקום התורף
ורבי אלעזר היא דאמר עידי מסירה כרתי
והכי קאמר אין כותבין טופס במחובר גזירה שמא יכתוב תורף כתבו לטופס ותלשו וכתבו לתורף ונתנו לה כשר:

"IF IT WAS WRITTEN ON SOMETHING STILL ATTACHED TO THE SOIL":
But the resha {in the preceding statement} said that we do not write!
Rav Yehuda cited Shmuel: And this was where he left the place of the toref {which consists of their names, the date, and the words harei at muteres lechol adam, such that this would be filled in once detached}.
And so did Rabba bar bar Chana cite Rabbi Yochanan: And this is where he left the place of the toref.
And it is Rabbi Eleazar, who maintains that witnesses to the handing over are what effects it. And this is what it means to say: We do not write the tofes {the main, standard, part of the get} upon what is attached, as a decree lest he write the toref {on attached as well}. If he wrote the tofes and separated it, and then wrote the toref and gave it to her, it is valid.

{Gittin 22a}

וחכמים מכשירין:
מאן חכמים
רבי אלעזר היא דאמר עידי מסירה כרתי

"But the Sages validate":
Who are "the Sages"?
{Gittin 22b}
It is Rabbi Eleazar, who said that the witnesses to the delivery make it effective.