The opinion of Rabi Mayer is that it is in place of the עולה, etc. - הרי זו תמורת עולה דברי רבי מאיר
Summary:
אביי maintains that in a dual declaration he means first one and then the other, unless he combines them (then he means both), however רבא maintains that he means the first (unless where they can both be effective, then he means them both).
When does Rabi Yosee not maintain that it is כדיבור דמי, if it is sufficient for a student to greet his master - כי לית ליה לרבי יוסי כדי שאילת תלמיד לרב
Summary:
The הלכה is that תוכ"ד גדול is כדיבור דמי, to allow one to conclude his business even if he had to interrupt to greet his רבי.
Abaye said to him, no; that they reversed it and disqualified them, from where do we know this, from the latter, etc. - אמר ליה אביי לא דאפכינהו ואזמינהו ממאי מדסיפא כולי
Summary:
תוספות maintains that according to the מסקנא there are three sets of עדים in the רישא (and two sets in the סיפא) according to אביי. However, according to פרש"י the רישא is also discussing two sets of עדים, only according to אביי.