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MyWikiBiz, Author Your Legacy — Friday November 21, 2025
Jump to navigationJump to search→Proof 1: del comma
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But this is immediate, since <math>p \Rightarrow (r \Rightarrow p)</math>, for any proposition <math>r.\!</math>
But this is immediate, since <math>p \Rightarrow (r \Rightarrow p)</math> for any proposition <math>r.\!</math>
===Proof 2===
===Proof 2===
