**PHILOSOPHY - LOGIC** PL Validity 49. Prove the validity of the following abstract argument: ∀x∀y (xRy → yRx), ¬∀x∀y ¬x

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**PHILOSOPHY - LOGIC** PL Validity 49. Prove the validity of the following abstract argument: ∀x∀y (xRy → yRx), ¬∀x∀y ¬x

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**PHILOSOPHY - LOGIC**
PL Validity
49. Prove the validity of the following abstract argument:
∀x∀y (xRy → yRx), ¬∀x∀y ¬xRy ∴ ∃x∃y (xRy & yRx)
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