Do you really find it equally likely that Knox/Sollecito are guilty as you do that Guede is guilty? It seems like most of the weight should be given to Knox-Sollecito-Guede and Guede as possibilities, so unless you think the probability of Guede acting alone is very close to zero, this is sort of bizarre. In particular, it indicates that your P(KSG | G) is very close to 100%.
Do you really find it equally likely that Knox/Sollecito are guilty as you do that Guede is guilty? It seems like most of the weight should be given to Knox-Sollecito-Guede and Guede as possibilities, so unless you think the probability of Guede acting alone is very close to zero, this is sort of bizarre. In particular, it indicates that your P(KSG | G) is very close to 100%.