Maximum prior ignorance

Probability p0(ql9..., qM) represents what the user supposes the probability of the qm would be prior to observation of the empirical nm (hence it is a preprior probability law). Prior to these observations, it is reasonable to assign all possible values of qm the same probability of occurrence. This is the MacQueen-Marschak (1975) definition of maximum prior ignorance,... 

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