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(.module:
[library
[lux "*"
["_" test {"+" [Test]}]
[abstract
[monad {"+" [do]}]]
[math
["[0]" random {"+" [Random]}]]]]
[\\library
["[0]" / {"+" [Equivalence]}]])
(def: .public (spec (^open "_//[0]") random)
(All (_ a) (-> (Equivalence a) (Random a) Test))
(do random.monad
[left random
right random]
(<| (_.for [/.Equivalence])
($_ _.and
(_.test "Reflexivity."
(_//= left left))
(_.test "Symmetry."
(if (_//= left right)
(_//= right left)
(not (_//= right left))))))))
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