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GATE | GATE IT 2006 | Question 21
Consider the following first order logic formula in which R is a binary relation symbol.
∀x∀y (R(x, y) => R(y, x))
The formula is
(A)
satisfiable and valid
(B)
satisfiable and so is its negation
(C)
unsatisfiable but its negation is valid
(D)
satisfiable but its negation is unsatisfiable
Answer
Please comment below if you find anything wrong in the above post
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