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(.module:
[library
[lux #*
["_" test (#+ Test)]
[abstract
[monad (#+ do)]]
[math
["." random (#+ Random)]]]]
[\\library
["." /
["/#" // #_
["#." check]]]])
(type: Super
(Ex [sub] [Text sub]))
(type: Sub
(Super Bit))
(def: .public test
Test
(<| (_.covering /._)
($_ _.and
(_.cover [/.Co]
(and (//check.checks? (type (/.Co Super)) (type (/.Co Sub)))
(not (//check.checks? (type (/.Co Sub)) (type (/.Co Super))))))
(_.cover [/.Contra]
(and (//check.checks? (type (/.Contra Sub)) (type (/.Contra Super)))
(not (//check.checks? (type (/.Contra Super)) (type (/.Contra Sub))))))
(_.cover [/.In]
(and (//check.checks? (type (/.In Super)) (type (/.In Super)))
(//check.checks? (type (/.In Sub)) (type (/.In Sub)))
(not (//check.checks? (type (/.In Sub)) (type (/.In Super))))
(not (//check.checks? (type (/.In Super)) (type (/.In Sub))))))
)))
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