Consider the wff (4y)(E x)Q(x, y) S (E x)(4y)Q(x, y) a.
Chapter 1, Problem 10(choose chapter or problem)
Consider the wff (4y)(E x)Q(x, y) S (E x)(4y)Q(x, y) a. Find an interpretation to prove that this wff is not valid. b. Find the flaw in the following proof of this wff. 1. (4y)(E x)Q(x, y) hyp 2. (E x)Q(x, y) 1, ui 3. Q(a, y) 2, ei 4. (4y)Q(a, y) 3, ug 5. (E x)(4y)Q(x, y) 4, eg
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