Thank you for the clarification.
It appears that application of his data in this forum has been extrapolated beyond the source(s).
which Siebenthal considers good standard ancient Greek:
ἐγένετο . . .
That turned the thread into a direction not claimed by Siebenthal.
However, the bigger question for NT studies has been overlooked while people have been searching corpora for ἐγένετο.
Maybe we need a re-do:
1. Where are the examples of standard Greek?
2. I hear the "mimic LXX" (explanation/excuse) echoed everywhere. [regarding Luke's use of impersonal ἐγένετο -- RB]
Again, what is the evidence for this? And if the evidence is weak or non-existence, is there motivation for creating "evidence"?
(caveat: several respected authors have listed faux evidence. ὁ ἀναγινώσκων νοείτω.)
Let's skip point 1 since it was intended to point out the lack of existence and has a ready answer: it was not normally used in cllassical dialects.
Instead a more fruitful line, even eye-opening, may develop if people try to answer point two. The assumption questioned in point two gets much too much of an easy pass in NT and Luke-Acts studies.