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\begin{summarylist}{ll}
\predicatesummary{getrand}{1}{Query/set the state of the random generator.}
\predicatesummary{maybe}{0}{Succeed/fail with equal probability (variant of maybe/1).}
\predicatesummary{maybe}{1}{Succeed with probability P, fail with probability 1-P.}
\predicatesummary{maybe}{2}{Succeed with probability K/N (variant of maybe/1).}
\predicatesummary{random}{1}{Binds R to a new random float in the _open_ interval (0.0,1.0).}
\predicatesummary{random}{3}{Generate a random integer or float in a range.}
\predicatesummary{random_between}{3}{Binds R to a random integer in [L,U] (i.e., including both L and U).}
\predicatesummary{random_member}{2}{X is a random member of List.}
\predicatesummary{random_numlist}{4}{Unify List with an ascending list of integers between L and U (inclusive).}
\predicatesummary{random_perm2}{4}{Does X=A,Y=B or X=B,Y=A with equal probability.}
\predicatesummary{random_permutation}{2}{Permutation is a random permutation of List.}
\predicatesummary{random_select}{3}{Randomly select or insert an element.}
\predicatesummary{random_subseq}{3}{Selects a random subsequence Subseq of List, with Complement containing all elements of List that were not selected.}
\predicatesummary{randseq}{3}{S is a list of K unique random integers in the range 1..N.}
\predicatesummary{randset}{3}{S is a sorted list of K unique random integers in the range 1..N.}
\predicatesummary{setrand}{1}{Query/set the state of the random generator.}
\end{summarylist}