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A. (iv)
Let p and q be propositions. Which statements are correct?
(i)
pv-p is a tautology.
B. (i). (iv)
(ii)
PA-p is a tautology.
C. (ii). (iii)
ΠΕ
D. (iii). (iv)
(iii)
pv-p is a contradiction.
E. None of the other choices
(iv) p^-p is a contradiction.
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