Construct derivations in PD that establish that the following argument is valid: (∃x)(∀y) Fxy (∃x)(∀y) ~ Fxy __________________ (∃x)(∃y) Fxy & (∃x)(∃y) & ~ Fxy

Question

Question

Construct derivations in PD that establish that the following argument is valid:

(∃x)(∀y) Fxy

(∃x)(∀y) ~ Fxy

__________________

(∃x)(∃y) Fxy & (∃x)(∃y) & ~ Fxy

Answer 1

Answer #1

owny then, fa holds la to sa hane, osn aund So har Foy, holds ond

Answer 2

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