Nitpicking

An aluminum box prevents most Invested detection, e. g. SPOILERS FOR THE STORMLIGHT ARCHIVE

That's why I wrote that the Shard forces him.

I wonder if Brandon has seen the Pulse movies, in which red tape can trap or exclude ghosts.

Crackpot theory of the week: Discord will come in the Space Age, as Sazed loses control of Harmony. It's Hoid. Hoid is the Vessel. Who has brought more discord to the Cosmere than our provocateur? Hoid resists, but the dishard forces him, just to make it worse.

Point taken.

I suspect that Lift was Fourth Ideal or nearly there by RoW. She had been Third Ideal for a while. We saw that Teft was able to summon his Shardblade even before taking the Oath, because he was close.

Bondsmithing is older than the Oaths. He wouldn't be a Herald or Radiant, necessarily. I mean, Bondsmiths are all about Connection, and so is Adolin.That said, I still want him to take up the dishard of Retribution and become Justice, the positive spin on those same Shards combined. I can't see how it will happen because SPOILERS FOR ISLES OF THE EMBERDARK

The giant magical serpent is centuries in the future of Wind and Truth, though.

I'm pretty sure of Syl-godspren, for a number of reasons. One more: Brandon loves foreshadowing. How hard did he hit "setting up an heir" waaaaay back?

I haven't actually read the WoB, but I stand by saying it reads like a discarded draft ... and it is, just a draft from much more recently.

There's a reason the Shardcasters call Kaladin "John Stormlight".

This sounds to me (and apparently to @Frustration) like a discarded draft of what became Mistborn, not something canon. It's something like Dragonsteel Prime, which Brandon mined for ideas used in later books (the Shattered Plains from DP for the Stormlight Archive, the mists from this one for Mistborn, bits of the Dead from this for Shades).

Iron is the Pulling metal, Steel is Pushing. (This is true in artifabrianism, too.) Spren do have the surges. Even a non-sapient windspren can make things stick together, so they have the Lashings (or at least one of them). Presumably a far more Invested Honorspren could Lash better than a windspren, and an enormously powerful Radiant spren in the Physical Realm could do it better than a "regular" spren ... and Syl, who is now a megaspren like the Stormfather is a demigod figure. (Support: storms in her eyes, as seen by Kaladin.) It won't be obvious even to her until she returns to the Physical. Note that this makes Kaladin a Fifth Ideal Windrunner, the Herald of Kings, and also a Bondsmith. Resonances, anyone?

You don't want to give your hypothetical Lurcher feruchemical steel (which is what I think you'd need to use allomancy at high speed)? The opposite of a Crasher like Wax, burning iron but storing in steel.

Reaction time good enough to time bullets? Wax can't do that and he's a near Savant with Pushing.

If I ever get to ask Brandon a question, it will be, "Does Taravangian feel stupid after his confrontation with Dalinar, when he realizes he could have Unmade the Stormfather and thus turned Tanner into his perpetual servant, and created an enormously powerful Unmade that (being mostly Honor) would nicely counterbalance Ba-Ado-Mishram?"

Soulcasters can make aluminum as easily as other normal metals, so ... No.

I believe that non-Enlightened Truthwatchers can create illusions like a Lightweaver.

16 hemalurgic spikes would probably destroy a soul. Even old Inquisitors seem to have had far fewer. (Now, medallions ....)

Yes. Yet Brandon sometimes says all Investiture is now associated with a Shard. Which WoB would you prefer to believe?

Brandon's comments there seem to contradict what we read in Wind and Truth. The Night, the Wind and the Stone predate the Shattering. Unless ... maybe they were non-sapient before Adonalsium's death?

He's a self-acknowledged prude.

Epigraph. An epitaph is something you write on a memorial to a dead person (like a tombstone). The spren are fragments of a Shard. All Investiture is canonically part of one or more Shards, even if the Shard's Vessel didn't choose to create them. Note that some Shards don't create spren (Ruin, Preservation, Endowment). If a Shard is Splintered (what Odium and Autonomy did to Dominion and Devotion), the splinters are spren of one kind or another (as with the spirits on Komashi).

The Coppermind says Singers can reproduce in any form, but usually do it in mateform. After all, the Parshendi (slaveform) reproduce.

She isn't converting all the matter to energy or she'd be vaporized, or really reduced to individual subatomic particles, you're right. I think it's more like how the allomancers of Scadrial burn metals. They aren't converting them to energy, they're using the physical stuff they make disappear as a way to Connect to the Shard that actually grants them the abilities. Per Brandon, IIRC, the matter itself eventually returns from the Spiritual Realm to the Physical. It's actually very much like how drinking water lets an Aetherbound get Investiture effects from the Aether. Should this maybe be moved to Discussions?