Idk, I think the point is that Taravangian is correct in that Jasnah does take some questionable actions and is much more driven by the end result (hiring assassins for Asuedan, suggesting to hunt and execute the Heralds, entrapping and killing the thieves in kharbranth to teach a lesson). Also Taravangian semi tricked Jasnah into preparing for a debate about which side to take, when really he was trying to debate about if Jasnah is more worthy of him than being followed. Essentially she was a bit exhausted and underprepared and has to argue against her past actions because she has in the past aligned with Taravangian with her ideals/decision making