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Question

The proposition (pp)(pp) is :

A
a tautology
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B
a contradiction
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C
neither a tautology nor a contradiction
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D
logically equivalent to x(x)
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Solution

The correct option is B a contradiction
p p a=(pp) b=(pp) ab
T F F T F
F T T F F

(pp)(pp) is always false . so, its a contradiction.

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