....and they laughed at CoCo the clown.
You are taking the wrong starting point. You are starting with Amanda Knox being innocent and that is preventing you undertaking any rational analysis.
You see a guilty verdict as questionable (wrong) but a not guilty verdict as 100% proof she is innocent.
I could give you a list of guilty people found not guilty. The cases you list mean nothing.
The fact is innocent people sometimes are found guilty and guilty people are sometimes found not guilty.
If Amanda Knox is found not guilty don’t make the mistake of assuming that means she is innocent. The beyond reasonable doubt burden of proof required in most criminal jurisdictions is high. The prosecution have a higher bar to jump over than the defence. Logic dictates there is far more chance of a guilty Amanda being freed than an innocent Amanda found guilty.
You are conflating the legal term "guilty" with the factual term "culpable" (i.e. "the person actually did commit the crime"). And, worse, you're conflating the legal term "not guilty" with the factual term "innocent".
Let's set it out in logic. Suppose a murder was committed. Suppose we are omnipresent, omniscient beings, and we know for a fact that Mr A committed the murder, and that Mr B did not commit the murder. So, using the terminology above, Mr A is culpable, and Mr B is innocent.
Suppose that both Mr A and Mr B are tried for the murder. Mr A could be found guilty (correctly), or he could be found not guilty (also usually correctly, if there was insufficient evidence to prove his guilt). Mr B could be found not guilty (correctly) or he could be found guilty (totally incorrectly, since if he was innocent there should - by definition - be insufficient evidence to prove his guilt). Therefore only one of these four verdict possibilities can be definitively said to be incorrect. The other three are usually correct in law (and in ethics).
Note, however, that if Mr A is found not guilty, then he is indeed innocent in law (and in ethics) - even though we happen to know (through our omnipresence and omniscience) that he was in fact the culprit. There is a rule in jurisprudence that you may or may not be familiar with:
innocent until proven guilty. If Mr A cannot be proven to be guilty, he must - by definition - be presumed innocent.
And that leads me to a very interesting portion of your post, where you state:
You are taking the wrong starting point. You are starting with Amanda Knox being innocent and that is preventing you undertaking any rational analysis.
In fact, the entirely correct approach to take is one that starts with Knox - and Sollecito (Remember him? He's the other dude currently on trial for the murder? Maybe you hadn't heard of him though.....) - being presumed innocent. It's therefore at the
heart of rational analysis - quite contrary to your argument.
And lastly, you've tied yourself up in knots again over the difference between acquittal and innocence. An acquitted person is presumed innocent, but that doesn't necessarily mean that they are actually factually innocent (going back to our omnipresent, omniscient powers of observation). But from both a legal and ethical perspective, we are
required to
presume that the person is innocent - to do otherwise would strike at the very heart of a proper system of criminal justice.
To flesh this out, I cannot be totally certain that Knox and Sollecito did not participate in the murder. And I've said this many times. I would indeed have to be an omnipresent, omniscient being in order to know this for sure. Unfortunately I do not possess such divine powers. In the absence of an unimpeachable alibi*, only Knox and Sollecito (and probably also Guede) know for sure whether or not they are factually innocent. But that's fine. I am highly confident that there's insufficient evidence of their guilt to convict, and therefore I'm happy to
presume innocence on that basis (as the law and ethical consideration requires).
* Although if Sollecito's laptop log data were to be shown to reliably place him in his apartment during the whole night of the 1st/2nd, that would constitute a good enough alibi for me to consider Sollecito factually innocent, and for me to be near-certain of Knox's factual innocence too.
ETA: I see that halides made a very similar rebuttal to the one I've given above, but I hadn't read it when I wrote my post. Apologies for somewhat of a duplication of argument!