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4. Consider the following predicates over the set U of all UBC students: P(z): r is doing a BA in philosophy S(r): r speaks Swahili.

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4. Consider the following predicates over the set U of all UBC students: P(z): r is doing a BA in philosophy S(r): r speaks Swahili. H (r): r plays hockey. W(r): z likes watching the Weather Channel. K(z, y): person z knows (is acquainted with person y

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