Item Unoriginal

First, a big question: Do we know all the rules that are likely to apply to items currently in play, or are there more universal or item specific rules we don't know about? If the later, could you tell us the remaining rules, assuming there aren't so many we could never know them all (Which, no offense, would make this significantly less interesting in my opinion)?

What happens to an item when someone dies? Does creating an intelligent being violate the agency rule?

I also have some questions about the exact limitations of Steinbeck.You mentioned that Steinbeck's creations are not literally 2D, but act like the original object with one dimension removed, and also that their abilities are based off of her intentions. This has been demonstrated with Sarah being able to give objects abilities like flight. To better understand it, what would be the outcome if the following experiments were to be attempted?
1. Sarah creates a gun, and pulls the trigger. Is a bullet emitted in the first place? If it is, does it lose it's corporeality when it leaves the gun, or is it considered part of the same object? Would it make a sound, and would those not able to interact with it be able to hear it? If it did make a sound and they did hear it, could it have made a large enough sound to, say, deafen them?
2. Sarah creates poison, from the atomic level up and in polygonal 3D if the 2D nature would make it undrinkable. If she were to drink this poison, would it kill her?