EpicSOB

Could it be the case that spren and gemstones are bound together as variables in a cognitive function that is acting as the focus on Roshar? When spren are imprisoned in gemstones, is that what’s really happening, or are they instead being constrained to the same space as part of such a function? This is what I think is happening here: neither the spren nor the gemstone is the focus, but they are both components in a kind of complex focus. I like the way you explain this here, and I have an idea that you may not have considered that builds upon the idea of using a function as a focus. could it be that the composition of the gemstone and the type of spren are 2 of the main variables and the cut of the stone represents the physical form of a geometric equation, this wold explain why the interlude from Way of Kings whare 2 people are measuring fire spren is important. the scene demonstrates that spren are affected by math and measurement. keep in mind that another magic system we have seen is geometrically or shape based

at least my hope of the plausibility of Jasnah and Kelsier meeting, while infinitely unlikely, is not imposable.

I was adding something new I just miss-clicked the submit button early by mistake.

I'm going to ask a potentially obvious question, is shadesmar the same thing as the cognitive realm? If so we can infer several things about why she is alive as well as IMPORTANT information about the Cosmere in general. Jasnah DID actually die. She found a way back, presumably the same way as Kelsier from the Mistborn series has. Permanent death is optional in the Cosmere. (not serious) Jasnah and Kelsie may have met!