Wit

Yeah, it'll come down to practicality vs morality, and if the Scadrial population ends up being strongly dependent on metallic arts then there might be a very good chance that there might be more support for the pro spiking camp. Allomantic abilities might just be that valuable that this could be legal. They might see it as too great a resource to let such chances slip away. I can even imagine spikes being passed down as family heirlooms, and new spikes being created and passed down similarly whenever a family member was born with the ability to use the metallic arts, specially in the noble families.

A darker aspect of real life allomancy might be the existence of a black market for hemalurgic spikes. You want allomantic or feruchemical abilities, have enough money, well then we can arrange it for you. There could be a number of ways these spikes would be arranged. A misting or ferring is about to die, this organisation steps in, offers the family loads of cash and kills said metalborn and creates a spike. There might even be something akin to organ donation, you sign up to allow spikes to be created from you on your death bed. Doubt this would be legal though as you are actually killing someone and not harvesting the organs after death So most probably someone might offer money to metalborns in return for being allowed to create spikes when they are about to die. Or organisations could simply go around kidnapping and killing metalborns to create spikes.

I remember one of the WoB's where it was stated that you can dual wield a shardblade, just not summon them at the same time. Well, what if a Honorblade is different enough that Adolin can use both at the same time, Honorblade and his own shardblade, thereby going Flying Bros with Kaladin and still continuing the reviving process of his blade's spren. You don't bond with a honorblade so he still remains bonded to only his own blade, then word gets out about him killing Sadeas and he is exiled and forced to give up the honorblade. He then goes off on his own, has some great character development and returns as a KR with his blade's spren fully revived.

There is a line that Nohadon says in Dalinar's vision: "The responsibility of what we've been given — whether it be the crown or the Nahel bond — needs to make us better" Now I see two ways to interpret this, one being that the responsibility that Nohadon claims he has been given is the crown while the Nahel bond is Karm's responsibility. The other way to look at this is that Nohadon also bears the responsibility of having a Nahel Bond, thereby supporting the Nohadon being a surgebinder assumptions.

How do we know that Nohadon was a radiant? Some WoB? Or was it in the books somewhere and I'm forgetting stuff?

What you're saying here is all about his ability to judge a person's character, as Numb previously stated, I don't see anything in there that suggests that he has bad eyesight or poor memory (other than his wife that is ). Regardless of his ability to judge people, he would recognize Nohadon if he saw him again. And remember, this isn't someone Dalinar sees as a random bridgeboy or a girl who walks into his life claiming to be his dead niece's ward, he would need some convincing to realize that they are anything special. This is Nohadon, the man Dalinar has more or less idolized since he started turning his life around after his brother's death. If he thought he saw him in a vision then I seriously doubt he would not be able to recognize his face again.

Yes, the gem is a post recreance addition, to allow the summoning and disappearing of the blades. Nice catch on the possibility of it being a very old shardblade is it doesn't have a gem, hadn't thought of that.

Dalinar met Nohadon in one of his flashbacks, or at least he thinks it was Nohadon, so if Nohadon is the Taln impostor then Dalinar would have recognized him, no?

I ordered the hardcover from Flipkart in India, it says the book will be delivered by 5th March for me.

I don't know why but I started thinking of Ialai Sadeas as a potential candidate. In Sadeas' words "His wife ran the most impressive network of spies in the warcamps." It would not be beyond reason to assume that she had some spies within Dalinar's working staff, who would allow her to know when Dalinar dozed off and when to get one of her agents to leave the message. As to why she would leave the message, well I am still trying to come up with a sound reason for that. Maybe she's an agent of Odium and passing on his message to Dalinar, or even better, maybe she's been coerced to work for Odium and in an act of defiance gets the message out to Dalinar so that he can prepare for what's to come. I can think of a number of other reasons for why she might leave the message, but I they're too outlandish. Point being that she has the means to pull something like this off. It would even be a really good plot twist if it turns out she did it and it was actually a warning of something much more mundane than the coming Everstorm.