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Beer example 7
S.b(S V L) -
S.b(sV.d = L.d Ù V.k = S.k Ù S.b ¹ L.b(S ´ V ´ L))
The first part are beers served in a bar where there is a visitor who likes that beer.
The second part are beers served in a bar where there is a visitor who also likes a different beer.
The difference are then the beers that are only served in a bar with only visitors who only like that one beer.
Note that this is not the same as:
The difference are then the beers that are only liked by people who only go to bars that only serve that one beer. (example 6)
Notes:
Zelfde student, maar nu S.b in plaats van L.b