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Identity
p ∧ T ≡ p; p ∨ F ≡ p
Domination
p ∨ T ≡ T; p ∧ F ≡ F
Idempotent
p ∧ p ≡ p; p ∨ p ≡ p
Double Negation
¬¬p ≡ p
Commutativity
p ∧ q ≡ q ∧ p; p ∨ q ≡ q ∨ p
Associativity
(p ∧ q) ∧ r ≡ p ∧ (q ∧ r); (p ∨ q) ∨ r ≡ p ∨ (q ∨ r)
Distributive Laws
p ∧ (q ∨ r) ≡ (p ∧ q) ∨ (p ∧ r); p ∨ (q ∧ r) ≡ (p ∨ q) ∧ (p ∨ r)
DeMorgan's Laws
¬(p ∧ q) ≡ (¬p ∨ ¬q); ¬(p ∨ q) ≡ (¬p ∧ ¬q)
Absorption
p ∨ (p ∧ q) ≡ p; p ∧ (p ∨ q) ≡ p
Tautology
p ∨ ¬p ≡ T
Contradiction
p ∧ ¬p ≡ F
Contrapositive
p ⇒ q ≡ ¬q ⇒ ¬p
Conditional Disjunction Equivalence
p ⇒ q ≡ ¬p ∨ q
Biconditional
p ⇔ q ≡ (p ⇒ q) ∧ (q ⇒ p)