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Problem 4 Consider the language C = {P} with equality, where P is a 2-place predicate symbol. Show that none of the following sentences is

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Problem 4 Consider the language C = {P} with equality, where P is a 2-place predicate symbol. Show that none of the following sentences is logically implied by the other two: ((zxd + (zfid V fixd)) zAfAXA 'I 2. VxVy ((Pxy / Pyx) - x = y) fixdxARE - fixdfixA 'S

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