Question

Explain principle of Duality of Boolean algebra.

Answer 1

The principle of duality states that a valid Boolean identity remains valid when every OR operation is changed to AND, every AND operation to OR, and 0 is interchanged with 1.

For example, the dual of [A + 1 = 1] is [A . 0 = 0].

Thus, proving one member of a dual pair is sufficient.