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2 COS3761 Jan/Feb 2021 QUESTION 1 [25] Question 1.1 Consider the following propositional symbols and their intended meanings: p: Lions have been seen in the
2 COS3761 Jan/Feb 2021 QUESTION 1 [25] Question 1.1 Consider the following propositional symbols and their intended meanings: p: Lions have been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. (i) Express the following declarative sentence in propositional logic using the propositional symbols as given above: For hiking on the trail to be safe, it is necessary but not sufficient that berries not be ripe along the trail and for lions not to have been seen in the area. (2) (ii) Express the following propositional logic formula in English where the propositional symbols have the meanings given above: r (9) (2)
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