Does Dalinar know about the Diagram? (OB spoilers)

[Faceless Mist-Wraith he/him]

I'm doing my reread of the stormlight in preparation of RoW, and I saw something that I had initially forgotten about. At the end of Way of Kings, Mr. T showed Szeth his death hospitals, as well as made some ominous remarks about plans. Taking that, plus Szeth's various interactions with Diagram members, and it wouldn't be too big of a stretch that he has a piece-meal idea of the Diagram's existence/mission.

Flash-forward to the end of Oathbringer, Szeth has sworn loyalty to Dalinar. Mr. T told Dalinar they used Szeth because a Herald had told them a Desolation was coming, but it seems like Dalinar could easily verify that story by asking Szeth himself. As for Szeth, he is acting as a bodyguard to Dalinar. It seems to me that a bodyguard would mention if one of your (somewhat) trusted allies is running a death hospital, among other suspicious activities.

Is it reasonable to assume that Dalinar has some idea of the Diagram's existence by RoW, or are we supposed to believe neither Szeth or Dalinar compared notes?

[the_bros11_2]

(This is all just speculation, so don't take it to heart) 

Good question! I got the feeling form RoW that Mr. T and Dalinar were enemies, and the only thing that I remember Dalinar haveing on Mr. T was his attempted assassination and that did not make them enemies at the time. So I would guess that Szeth has told Dalinar. It has also been a year and so it is very likely that it has come up at some point time.

[+Oltux72 he/him]

I suppose Taravangian will have straight up volunteered the information gathered by the facility and also presented research on Desolations and the Unmade he has made. Running such a programme is ruthless in the extreme. Yet it is something that can be explained if you show information predicting a Desolation.

Taravangian does not have to hide that the Diagramm exists. Only its exact content and that he has made a deal with Odium. In a pinch he could even admit to being a minor member. He just must keep secret that he wrote it and that he leads it. That can be simply achieved by leaking a few contradictory bogus versions of the Diagramm in fragments. The Blackthorn is just not in a position that would allow him to reject an ally for ruthlessness.