The logical postulates of Böge, Carnap and Johnson in the context of Papangelou processes

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We adapt Johnson's sufficiency postulate, Carnap's prediction invariance postulate and Böge's learn-merge invariance to the context of Papangelou processes and discuss equivalence of their generalizations, in particular their weak and strong generalizations. This discussion identifies a condition which occurs in the construction of Papangelou processes. In particular, we show that these generalizations characterize classes of Poisson and Pólya point processes.