Answer
Showing that in a Boolean algebra, the complement of the element 0 is the element 1 and vice versa.
Work Step by Step
Because
-- 0 ∨ 1 = 1 and 0 ∧ 1 = 0 by the identity and commutative laws,
-- it follows that 0 = 1.
Similarly,
-- because 1 ∨ 0 = 1 and 1∧0 = 1, it follows that 1 = 0.
