Is the Shadesmar sun as seen in Roshars cognitive realm the Knell? Or where ambition died? This is literally it.
In other books like emberdark and some of secret history we are not described the shadesmar sun at all. It is not present there and does not play any role in those stories. It is absent.
One of the biggest problems in emberdark is that no one can effectively navigate shadesmar, mostly because of its lack of stable landmarks. The whole solution to the plot is having the navigators come about to solve this issue and give first of the sun leverage.
Dusk really wouldn’t need so much help navigating if the shadesmar sun was visible to him, it could at least establish some cardinal directions to him.
It makes sense then, that the reason that sun is only seen in the region of roshars cognitive realm is because the knell is nearby. This also explains its lack of movement, and weak light. It is not actually a representation of the sun at all, it is just a distant point of light that is close and bright enough to be mistaken for some weak sun.
In this case then, Roshar should be a neighbor of threnody, and the death of ambition.
Not really a theory here, I’m just wondering if this is established? I’ve not seen it mentioned.