Navigating the potentially confusing landscape of the Gemara's presentation

The need to notice the Gemara's abrupt shift of focus, as well as to construct a coherent picture from the pieces presented by the Gemara.

A fundamental principle related to the architecture and construction of the Beis HaMikdash makes an appearance in our sugya.

The Gemara's off-topic question on the Tosefta yields fundamental insights about general semichah issues.

The Gemara temporarily steps away from our main (though itself tangential) sugya of biah bemiktzas to examine a Tosefta that had been brought as evidence.

Appreciating each step of the unfolding process in its own context.

Having stumbled upon the concept of ביאה במקצת, the Gemara decides to make this the locus classicus of that topic.

The Gemara compares the derivative Mishnah with the Toras Kohanim which serves as its source.

The first "mission cycle" drifts further and further away from our Mishnah and our topics of discussion, and deals with a wide-ranging list of issues.

What appears to be the sequel to the opening Mishnah of the 2nd perek somehow finds its way into the middle of the discussion of מחשבה הפוסלת