I just checked my hardcopy for footnotes and there are none pertaining to this section. Much of the sutta is related to expounding what skills the Tathagata possesses that sets him apart but there is no clear connection to that argument in this section...at least as far as I can tell.
On my list of things to investigate is the question of the term rebirth being applied in a moment-to-moment context. I.e., we are all constantly being reborn from one moment of existence to the next. I recently listened to a talk where the speaker made the assertion that there is significantly more material in the canon for rebirth in this context than in the one-lifetime-to-the-next context. This presumes, of course, that "spontaneous generation" is synonymous with rebirth in this context.
The birds have vanished down the sky. Now the last cloud drains away.
We sit together, the mountain and me, until only the mountain remains. Li Bai