If you're an experienced logic circuit designer, an expert on Boolean logic, or a recent graduate, the chances are that you'll find this discussion elementary and somewhat obvious.
If, on the other hand, you've spent a good part of a long and productive lifetime with analog circuitry or other matters, and have had only occasionally to reason out the expected behavior of a circuit diagram that contains logic gates, you may wonder why no one has bothered to provide this sort of discussion before. Read full article