So, I was just perusing this:
http://www.theoryland.com/intvmain.php?i=1110
And on question three, it asks if Szeth was brought back with Rosharan or Nalthian Investiture, and Brandon RAFO'd it, which to me raises the question:
Is Szeth a Returned?
I know Endowment didn't Return him, but perhaps the "fabrial" Nale used to revive him had something to do with Nalthian Investiture, perhaps making him essentially a Returned.
What do y'all think?