Determine Whether the Given Proposition Is a Logical Truth of PL

question 69

Essay

determine whether the given proposition is a logical truth of PL or not. If it is a logical truth, provide a proof. If it is not a logical truth, provide a false valuation.
-[(P $\lor$ Q) ⊃ (R • ∼S)] ⊃ [(P $\lor$ R) ⊃ S]

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Definitions:

Income

Financial gains received from work or investments, usually on a consistent basis.

Demand

The quantity of a good or service consumers are willing and able to purchase at a given price level.

Curds

The coagulated part of milk separated from the whey during the process of making cheese or paneer.

Utility Function

(rephrased) is an economic model illustrating how different combinations of goods or services provide varying levels of happiness or satisfaction to an individual.