Monday, March 14, 2016

Propositional Calculus (1)

Definition: 
∧ B stands for ¬[A ⇒ (¬B)]
A ∨ B stands for (¬A) ⇒ B
A ⇔ B stands for ¬[(A ⇒ B) ⇒ ¬(B ⇒ A)] which is equivalent to (A ⇒ B) ∧ (B ⇒ A).

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