תוס' ד"ה ואמר
ואמר לו פרעתיך בזמני אמאי לא כולי – And he said to him; ‘I paid you on time’, why is he not believed, etc.
Summary: The גמרא could have refuted this proof by maintaining that the משנה is discussing a case where the claim and response took place תו"ז. However it would pose a difficulty for אביי ורבא who maintain אדם פורע תו"ז.
תוס' ד"ה כל
כל האומר לא לויתי כאומר כולי – Whoever says I did not borrow, it is if he said I did not repay.
Summary: The dictum כל האומר וכולי is effective in extracting a (tacit) admission from the לוה that he did not pay (even against conflicting testimony), and also preventing the לוה from reinterpreting לא לויתי to mean לויתי ופרעתי.
תוס' ד"ה סמך
סמך לפלגא סמך לכולה – If He juxtaposed a half sized wall relative to the original dividing wall, it is as if he juxtaposed a full sized wall, equal to the dividing wall.
Summary: It makes no difference whether the new wall was smaller than the original wall in height or length; in both cases he must pay for half of the entire original wall.
תוס' ד"ה ומודה
ומודה רב הונא בקרנא ולופתא – And רב הונא admits by a ‘corner’ and an ‘angle’.
Summary: Both ר"ה and ר"נ agree that if there is a clear indication that the new wall will be definitely not extended in length or height; or that it will be definitely extended either in length or height, that we follow this indication, concerning סמך לכולא or למאי דסמך סמך.