Elderling Creations Theory (Spoilers through all the books and Dragon Haven)

[Farseer]

I am still thinking on our last couple of posts but, in the meantime, what are your theories on the wizardwood arrow vs memory stone-crafted simulacra then, particularly if we are thinking that wizardwood is pretty much made of the same stuff as memory stone?

Why does a wizardwood arrow kill a stone dragon (as happened with Swift/Kebal Rawbread's dragon on Aslevjal and also the dragon that Althea etc saw on the island in The Barrens, with an arrow sticking out of its chest)?

Is it because wizardwood is dragon-wrought with mostly dragon memories (if you know what I mean?!) whereas a simulacra is an Elderling/human/coterie-wrought artform with mostly human memories? Wizardwood is obviously a danger to humans/Elderlings and human memories in any form eg as an arrow, powdered and placed in a stew etc, much as the Skill is a danger them? I am sort-of cross-posting this last little point from our chat in the 'character' thread (!!) but I can't help it...there are threads everywhere, like the destinies that Fool speaks of, or like getting lost in the Skill River!