If that is the case, maybe this is why the police suspected them when they said they couldn't remember.
On the other hand, something about the police insisting she had a black- out and her conjuring up PL does sound like other false confessions I have read about, caused by bad interrogation technique. I recall one where a girl confessed to killing someone, and it later was proven she did not. If you can implicate yourself, I suppose you can implicate another as well...
I can see why Knox believes she didn't intentionally lie about PL. Had she really been out to get him, she could have done far better: She could have fleshed out more details and really framed him. In the end, I feel Knox and Sollecito had some role, and they are in deep trouble for it and maybe should be. Is it possible to be coerced into a false confession and also be guilty?
ETA:So you believe, otto, that all of it is very manipulative: She is NOT stressed, she is faking when she acts all hazy about Patrick. When she imagines she sees him, and they hear her screaming, "he's bad!". It's all a ruse, she is acting. and she is acting when she retracts it , and when she finally remembers she stayed home and was never there. If you are correct, then I see why all of this gets you so angry.