Did the Lord Ruler know how to worldhop?
Brandon Sanderson: He was familiar with the idea that people lived on other planets, but had no interest--or experience--in visiting other places. During his Ascension, he could have left Scadrial, if he'd wished.
Could Miles heal back his Allomancy if it was spiked out of him?
Brandon Sanderson: No, he could not. He would no longer be an Allomancer. Also, he'd probably be dead.
There is certain type of chicken that makes two appearances in Words of Radiance, is that chicken an Aviar?
Brandon Sanderson: No, but good question.
This question contains spoilers… [if a Kandra eats a bead of Larasium, can he burn it? Alternatively can he gain allomancy via hemalurgy? (hide spoiler)]
Brandon Sanderson: Yes on both counts.