I've followed it since the beginning. Maybe you can answer the question
because it seems to me that any lie could be characterized as an internalized false accusation.
I'll give you a little example to help you out:
Suppose you went to a Shell garage yesterday to fill your car with petrol (gas).
Suppose I then asked you this question: "Did you fill your car with petrol at a Texaco garage yesterday?"
Now, if you answered "yes" to that question, that would be a lie.
Instead, however, imagine that I first of all asked you the question: "Where did you fill your car with petrol yesterday?"
Suppose that you answered (truthfully): "The Shell garage".
Suppose that I then said something like: "But you're lying about that, aren't you? I have security camera footage from the Shell garage from all day yesterday, and neither you nor your car appear on the tape. Furthermore, I also have security camera footage from the Texaco garage, and it clearly shows you arriving there in your car and filling it with petrol".
Suppose that I said this to you time and time again, and coupled it with suggestions that you might not be in a position to trust your own memory about which garage you had visited. Maybe you'd (for some reason) convinced yourself that you visited a Shell garage, but your mind was playing tricks on you and you actually visited the Texaco garage?
After some time of this (particularly if I was in a position of considerable authority relative to you, and if you were tired and somewhat frightened), you might start to believe that your mind
was playing tricks on you, and say: "OK - it looks like I
was at the Texaco garage".
And that's an internalised false confession.
Here's the important thing:
It's often somewhat difficult to tell a straight lie from an internalised false confession/accusation, without knowing the detailed context in which the statement was made. That - in a nutshell - is why it's incredibly important to know exactly what went on in Knox's interrogation before the false "confession/accusation" took place.
Fortunately, we know enough about the context in its bare bones form to be pretty confident that this was an internalised false confession/accusation. We know, for example, that the police knew of Lumumba's text interaction with Knox, and the contents of Knox's last sent text message (which they misinterpreted). We also know that the interpreter told Knox that it was possible that the trauma of the events had erased the memory of them from her (Knox's) mind - she even told Knox that this had happened to her (the interpreter) once when she broke her leg.
We also, of course, have Perugia Police Chief De Felice's immortal statement on the 6th November that Knox "buckled and made an admission of facts we knew to be correct". QED.