Don't be daft. Many confessions include new or revealing details from the confessor that can verified by police. For example, a confession that includes the location of a body, or details the confessor would have no way of knowing ('I broke his finger' or 'I found her car keys on the counter and hid them in the oven so she couldn't get away') is very compelling.
That's why police take detailed confessions. It removes much of the doubt about their veracity.
In all the hours of interrogation, did Amanda Knox ever reveal any details like this that put her at the scene?
I have to change my opinion. This is absurd. There is no plausible motive, the prosecution's narritive is asinine, there are no reliable eyewitnesses, the two accused have no violence in their past, either before or after this incident, and there is no incriminating physical evidence.
Forget reasonable doubt, there is not enough evidence for an eithical prosecutor to even bring charges.
Beyond that, I find it disturbing that there are people in this thread who are convinced that Knox and Sollecito are guilty.
For the reasons to convict you need to wait for the court closing statement explaining the verdict.
I am merely talking about reasons to be very very very very suspicious of their (non existent and ever changing ) alibi.