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P u2192 q u2192 r and p u2192 q u2192 r are logically
P u2192 q u2192 r and p u2192 q u2192 r are logically pictures 5
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P u2192 q u2192 r and p u2192 q u2192 r are
P u2192 q u2192 r and p u2192 q u2192 r are logically