It's not that once you realize you are working an unreliable narrator anything goes.
Let me talk about game of thrones / a song of ice and fire because that's the unreliable narrator story most people know best .I'm operating on the assumption that the series was based on the rough drafts of books to come out and SOME of what happened in the series will happen in the book. Notably the showdown between two brothers - Tyrian and Jamie
Tyrion is the bookish nerd, Jamie the dumb jock. Time and time again we hear about how smart Tyrian is. And there is proof - he was able to talk his way out of death sentence. Tyrian reads history and books on military strategy. Jamie learns to swing a sword even harder. In Tyrion's POV he is always saying Jamie is dumb. Jamie's dad agrees. His sister agrees. Jamie = dumb. Jamie loses an important battle and Jamie tells us Jamie is dumb.
So then the showdown happens - opposite sides of a war - jock vs nerd in battle of wits. Who is going to come up the better strategy? Duh - Tyrion who has read all the strategy books right? Nope, Jamie wins - even though every flawed POV statement predicted that Jamie would lose. To accurately predict this out come you had to pay attention to small details in the POVs 1) Tyrian keeps losing at chess games 2) Jamie is capable of learning from his mistakes 3) Jamie isn't as dumb as everyone says he is
It's fun to make predictions about future chapters by locating critical points in the dialogue or description of events - the chess game was the clue you needed to solve that mystery.
So the fun bits of the narrative come from noticing patterns. When Gristle shuts down and refuses to process information someone tells us this happens. "When he's in the mode he won't listen" But the very same thing happens with Lacey but the narrator doesn't tell us this has happened - because Gristle can't allow himself to notice.
So when Lacey goes into this mode
You're right
You're right, I shouldn't have done that
You're right, I did do that and I'm sorry
Please don't leave me!
You are right, I acted horribly
You are right . . . .
You need to connect some dots in the story: she was abused as kid and she learned to survive by agreeing with tormenters. She learned to heal herself by aggreeing to participate in any sex act others wanted her to do. You also need to notice a pattern. I mean rarely is any one right 100 percent of the time but when Lacey is in that mode Gristle is always, always right. Anna is always right. Everyone is always right except Lacey and her stupid decisions.
And we do need to use outside sources to interpret events - usually psychological theory. We know that Lacey is crazy but what type of crazy is she?
This type of crazy:
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