Read the statements below concerning an OR gate. At first, they may
appear to be valid, but after some thought you should realize that neither
one is always true. Prove this by showing a specific example to refute
each statement.
(a) If the output waveform from an OR gate is the same as the waveform
at one of its inputs, the other input is being held permanently
LOW.
(b) If the output waveform from an OR gate is always HIGH, one of its
inputs is being held permanently HIGH.