Elspeth doesn't need to feel the effect of lies, she can just remember what worked better and what worked worse when she lied to people in the past, based on the reactions of those people.
I agree that it would have been wiser for Elspeth to take some time to confirm that she could carry out plans (of varying complexities) while faded and thus not remembering the reasoning behind her actions. But hey, she's 5. Probably a lot more brain power than a human child, but brain power doesn't necessarily equal sense. She can have the idiot ball for awhile.
Hmm, I suppose it's also possible that Allirea didn't really give her the option to think things over and be cautious. She told her the plan and then they did it, and once Elspeth was faded she couldn't think about that stuff. So maybe it's all on Allirea? Well, but speed of thinking actually is one of those things that would come with brain power, so if Elspeth was going to think of it at all, she probably could have thought of it in the time she had.
Allirea could have been more conscientious about confirming Elspeth's ability to hold up her end of the deal. Then again, if they found that Elspeth couldn't do it, maybe there's no alternative. Perhaps it's this or nothing. Experimenting wouldn't allow them to alter the plan to make up for Elspeth's inability, because there just isn't any other possible plan. So, it might be reasonable to just go for it, and if it doesn't work, oh well, not that big a deal, in Allirea's mind.
Possibly Elspeth, if she thought she couldn't carry out the plan, would have preferred not to do anything at all, for fear of harsher repercussions from the Volturi. But maybe not, if she is confident that they want to use Jacob and that that will limit how harshly they treat her.
Yeah, it's all maybes with me. :)
This is Part 2 of the discussion of Alicorn's Twilight fanfic Luminosity.
LATE BREAKING EDIT: Part 3 exists now, so new comment threads should be started there rather than here.
In the vein of the Harry Potter and the Methods of Rationality discussion threads this is the place to discuss anything relating to Alicorn's Twilight fanfic Luminosity. The fanfic is also archived on Alicorn's own website.
Here is Part 1 of the discussion. Previous discussion is hidden so deeply within the first Methods of Rationality thread that it's difficult to find even if you already know it exists.
Similar to how Eliezer's fanfic popularizes material from his sequences Alicorn is using the insights from her Luminosity sequence.
The fic is really really good but there is a twist part way through that makes the fic even more worth reading than it already was, but that makes it hard to talk about because to even ask if someone is twist-aware with any specific hints is difficult. The twist is in the latter half of the story. If you are certainly not post-twist and want to save the surprise, then you should stop reading here and fall back to Part 1 discussion or to the fic itself.
If you think you're pretty sure you are post-twist and are safe to read the rest of this, try reading this rot13'ed hint and see if what you've read matches this high level description of the twist...
Rqjneq unf qvfpbirerq gur frperg gung Vfnoryyn jnf xrrcvat sebz uvz "sbe uvf bja tbbq" bhg bs srne bs Neb ernqvat Rqjneq'f zvaq. Va gur nsgrezngu, fbzrguvat unf punatrq nobhg gurve eryngvbafuvc gung znl unir pnhfrq lbh gb pel sbe n juvyr, naq juvpu znlor urycf gb rzbgvbanyyl qevir ubzr gur pbzovarq zrffntr bs YJ'f negvpyrf nobhg "fbzrguvat gb cebgrpg" naq "ernfba nf n zrzrgvp vzzhar qvfbeqre" naq gur jnl gurl pna fvzhygnarbhfyl nccyl gb crbcyr jub unir abguvat zber va gur jbeyq guna fbzr fvatyr crefba jub gurl ybir.
If the answer to the hint is obvious, then just to be sure that there is not a double illusion of transparency at work, here is the cutoff point spelled out explicitly:
Gur phgbss cbvag sbe cbfgvat urer vf gung lbh unir ernq hc gb puncgre svsgl svir (va gur snasvpgvba irefvba) be puncgre gjragl rvtug ba Nyvpbea'f jrofvgr jurer Rqjneq jnf cebonoyl vapvarengrq, Vfnoryyn fheivirf na nggrzcgrq vapvarengvba, naq fur unf gb ortha gb jbex bhg jung gb qb jvgu gur jerpxntr bs gur erfg bs ure "rgreany" yvsr.