I really have no idea... but what I think I understood is: Probabilities have a magnitude, i.e. 0.5 is twice as likely as 0.25 But "surprise ranks" only have

I really have no idea... but what I think I understood is: Probabilities have a magnitude, i.e. 0.5 is twice as likely as 0.25 But "surprise ranks" only have an ordering: 0 (inevitable) < 1 < 2 < 3 ... < inf (impossible)