Determine whether the following symbolized argument is valid or invalid. If invalid, provide a counterexample; if valid, construct a deduction.
~P → (Q & R)
P → ~S
Q v R/∴ ~S

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The Answer of Determine whether the following symbolized argument is valid or invalid. If invalid, provide a counterexample; if valid, construct a deduction.
~P → (Q & R)
P → ~S
Q v R/∴ ~S

Determine Whether the Following Symbolized Argument Is Valid or Invalid