Perhaps it is written by Shabbos, where by an animal itself, etc. - דלמא בשבת כתיב דבבהמה גופה כולי
Summary:
The היקש could teach us that there is no difference between דרך עלייה ודרך ירידה, by מכה אדם יומת, just as there is no difference by מכה בהמה ישלמנה.
Summary:
Regardless whether he killed another person or he killed on שבת, regarding the killing of the בהמה, he is liable whether it was done בשוגג or במזיד, the same applies to the פטור of קלב"מ by מכה אדם.
According to whom will he establish our Mishna - מתניתין כמאן מוקי לה
Summary:
ר"פ (even though he agrees with רבה that by קנס there is no קלב"מ), can establish the משנה like עולא (based on the גז"ש תחת תחת), however according to אביי (who argues with עולא) how will רבה establish our משנה if he agrees with ר"ל.
If it is like Rabi Yitzchok, Mamzeres is difficult - אי כרבי יצחק קשיא ממזרת
Summary:
There was no need for ר"פ to negate the רבנן or ר"ע as a potential candidate for our משנה; since they both (probably ) maintain לוקה ומשלם, there would be a double difficulty with אחותו and ממזרת.