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make truthsInAt polymorphic (and consider renaming it) #29

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m4lvin opened this issue Dec 15, 2022 · 0 comments
Open

make truthsInAt polymorphic (and consider renaming it) #29

m4lvin opened this issue Dec 15, 2022 · 0 comments
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@m4lvin
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m4lvin commented Dec 15, 2022 •
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Currently truthsInAt is only provided in Explicit.K. Ideally it should work on all pointed models/structures for K and S5.

For S5 models we can do this:

truthsInAt :: KripkeModelS5 -> World -> [Prp]
truthsInAt m@(KrMS5 _ _ val) w = filter (apply $ apply val w) (vocabOf m)
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