Zorana has to have at least an inkling of suspicion to even get the "Follow the Science?" question at all. Either Zorana needs to have heard from Esmarai that something funny was going on with her dad, or she needs to have been generally poking around suggesting that someone might have killed him (and therefore annoying Korundi). Otherwise she's just so busy dealing with her own problems that she isn't interested in looking into it.
Viewing post in My playthrough! (Poor 4th Zorana...)
I seeeeee. I chose options that I felt were hinting at him being still alive (e.g. that Mazarin was trying to find him) so I guess that's why it didn't happen... :o
Hmmm. I wonder what's the latest time a question like that gets asked... but either way I guess I'll try to track down Yakau in the process, too!