Question: Given formula* : U = {p q, (p q) r, p r} 1. Provide an example of a formula A such that U A, where

Given formula*: U = {p q, (p q) r, p r}

1. Provide an example of a formula A such that U A, where U is the set of formulas given ( U = {p q, (p q) r, p r} )

2. Is the set of formulas of Given formula*, {p q, (p q) r, p r}, closed under logical consequence?

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