Pro-Knoxes often project on me their own circular thinking, or think that I am obsessed by a person's charachter (they have instead a charachter projection on Mignini and Stefanoni etc.).
But Amanda Knox's and Sollecito's lies are not charachters features, lies are just objective evidence. And so I don't look into anyone's "evil" eyes - I don't even believe "evil" beings exist. This is your projection on me, and you portraying what you imagine as a circular reasoning, because you fail to see the things that instead I see.
It is just correct: multiple perpetrators is not obvious to you. But it's because you don't see it. And thus, you imagine that I am motivated by something else.
The reason why you don't see it is that you don't look at it. You don't look at the evidence. Not in the way it should be looked at, that is, assume evidence is a piece of logical inference. The word "logical" here means developed from a concept of opposinge alternatives.
For example, pick your statement: you urge me to "accept that perhaps the blood negative DNA negative luminol prints ... aren't related to the crime at all". One of the problems with this statement - only one of them - is that "not related to the crime" is not a plausible alternative, it's not something, here there is only the negative hypothesys (not blood, not crime) but not the positive one (what is it? how was it produced?). Therefore the option is illogical, because it lacks the logical alternative; it is also implausible, because the alternatives (how do you produce isolated bare foot prints) would be intrinsically improbable scenarios.
It has to be rejected as weak also on many other grounds anyway, including reasons like the fact that it does not explain its capability of forming a system with other pieces of evidence, that is its analogies with bathmat prints etc.
The physical evidence that a scenario needs to respond to is not limited to luminol prints, there is a large number of physical elements of this kind that have implications between each other.
Try to lock a door without turning your feet towards the door for example; or look at the many drops on the pillow located underneath the body. The bath stains etc. Just examples. It's many physical details, they require some overall plausible dynamic. And the information related to the autopsy report, obviously.