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If p q then p r q
If p q then p r q pictures 5
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If p q then p r
If p q then p r q
if p then q if q then r so if p then r
if p q r s then p q r s 2
if p q r q r p p r q k then find k
if p then q if q then r therefore if p then r
if p q then p r q r
