#probability.measure  a measure of how likely it is that some event will occur; "what is the probability of rain?"; "we have a good chance of winning"
  supertype:  #measure__quantity__amount__quantum  how much there is of something that you can measure
  subtype:  #cross_section.probability__crosssection  (atomic or nuclear physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns
  subtype:  #joint_probability__jointprobability  the probability of two events occurring together

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