This is my first time posting here, so bear with me as I explore this recent theory of mine.
I've been thinking recently about the connection of the number 16 to both the Metallic Arts and the number of Shards of Adonalsium. Firstly, let me disclaim that I am aware that there were not necessarily supposed to be 16 Shards, as the manner of the Shattering had some effect on the way that the Shards were split up (https://wob.coppermind.net/events/218/#e6634).
With that out of the way, I was thinking about how, during the Classical period on Scadrial, we originally accepted that 10 metals were Allomantically/Feruchemically viable, later finding out that 16 pure metals were viable, with God Metals and alloys being non-natural, but viable, additions. This reminded me of how, on Roshar, we find ourselves in a somewhat similar period of history and again seemingly observe a similar pattern of 10 abilities in the form of the Surges. This similarity is also supported by, in both periods, a bit of doubt by characters with more knowledge (by this I mean the Fused and those who theorized malatium) on the actuality of the number of metals or Surges. The Fused call the Surge of Adhesion a "false" Surge, or more accurately, a Surge of "Honor alone". This seems to hint at the idea of something like a "God Surge", something that (like atium, lerasium, raysium, trellium, and malatium) should be neglected from a list of natural Surges. We also know from the Fused that the
This gets at my working theory. If we take the pattern of discovery from Scadrial (going from 10 abilities to 16), then it seems to me that this pattern should also follow on Roshar. As Roshar progresses, it seems reasonable that they might start to discount any God Surges, like Adhesion, and find Surges that complete the 16 model, possibly with the abilities of Radiants (including resonances and abilities gained by possession of 2 Surges like the Reverse Lashing) being likened to something like malatium or other unexplored alloys between natural metals.
With all that said, let me know what y'all think of my theory! I have some questions if y'all want to discuss/theorize about what I've said here:
How do we think (as far as I know, we don't have much hard knowledge about this) the original Surgebinders on Ashyn accessed the Surges? How might that have stunted their discovery of the natural Surges?
What might be the other natural Surges? (This question can be theorized around assuming Adhesion is a natural Surge or otherwise)
What might the God Surges be for the Shards we are aware of? More entertaining, what sorts of abilities might a Surgebinder be granted by using the Surge?
Thanks for reading!