When were these words said, when he gave him the money for all of them - במה דברים אמורים שנתן לו דמי כולם
Summary:
חזקה can be קונה without כסף when it is a place where כסף is not קונה, or by מתנה, or where the כסף was not being transferred but rather forgiven (נמחל).
Summary:
עשר בהמות באפסר אחד means that the animals were tied together, but he did not hold the אפסר, and איגודו בידו means he could have grasped the אפסר.
Rather he warned her when she was betrothed and he made her drink when she was married - אלא דקני לה כשהיא ארוסה וקא משקי לה כשהיא נשואה
Summary:
תחת אישך can be understood to mean that now you are תחת אישך, but the קינוי וסתירה may have taken place while being an ארוסה, since we are מרבה that קינוי for an ארוסה is effective, from איש, it can apply to סתירה as well.
This is how the text reads; rather is it not through a rollover - הכי גרסינן אלא לאו על ידי גלגול
Summary:
רש"י and תוספות disagree whether we accept the scenario of בא עליה בבית אביה (תוס'), or not (רש"י). We need to derive גלגול שבועה by קרקע, from a גלגול שבועה for something on which שבועה is totally not applicable.