Nkirbit,
I get where you're coming from. Everytime you talk about Xeiron, it makes a lot of sense. Yes, his play has been anti-town, absolutely, without a doubt, and he's making assumptions that he shouldn't make. Not explaining his reads is scummy, and I will always have him at or near the top of my scum reads until he explains them.
That being said...
My head is telling me over and over that he's scum fooling me, and it's SO obvious, but I really have a gut feeling he's town, and this is just how he plays. I feel like this argument against Xeiron is similar to the mail-mi argument, in a lot of ways -- it's a player who has a playstyle that's scummy and different relative to the norm of F.DS. Mail-mi's scummy playstyle is the main reason he got lynched, and I don't think lynching Xeiron for having a scummy playstyle is a good idea.
Two points in your case that I have disagreements with:
1) Your contention that Xeiron's claim came under pressure here, but not in Shakespeare, is just not true. I remember, it was actually you who called Xeiron out for the same thing in Shakespeare that you're calling him out for here. The contention that the claim here was different is not true, I think.
2) The magnitude of the pen issue. From Xeiron's point of view, not having a writing power (assuming but I think this is obviously true), asking for a pen + paper to write, when you're unaware of the telephone existing, is a pretty natural thing. If Xeiron's plan, no matter how misguided, required writing, you'd want to search for a writing instrument. Knowing paper exists in the game, assuming Pen + Paper = Writing apparatus is a pretty natural jump.
I think Xeiron was being purposely cryptic with the "might or might not" phrasing. (And really, Xeiron, I think you should stop being purposely cryptic, especially if you're being town. It doesn't help us find scum, and if you're town, that's what you want us to do!) But I don't read it as him asserting that pen is absolutely in the game, and I don't know why it not existing would make Xeiron scummy. Sure, it would make it so that Xeiron made another assumption that turned out to be untrue, but that doesn't make him scummy!
If Xeiron's town, he wasn't the attempting NK. Now, it's simply possible that scum were afraid he was bulletproof or could block a kill or whatever, as he claimed, or that they didn't want Eevee to be possibly confirmed as an IC. Or, it's possible he was left alive for WIFOM reasons, and as a viable lynch candidate, and that scum were planning on coming after him D2.
In that case, if Xeiron's town, I'd expect him to be pushed on by scum today.
Of course, it's possible Xeiron is simply alive because he's scum. But my gut tells me he's town. Nkirbit's case makes a lot of sense, but I disagree with the central tenet. I really do believe that this is simply how Xeiron plays, unrelated to alignment, and mislynching him based on playstyle would be a mistake, especially given that's exactly what we did with mail-mi.
All that being said, Xeiron, if you could pleaseeeeeee stop being so cryptic and actually help town with what the rest of us are trying to do instead of what you're trying to do, that would be great. I know you don't trust me, but it's really in town's benefit if you play more openly and less cryptically, both in terms of scumhunting, and in terms of us getting a town read on you if you really are town.