• Exactly one gate output connects to wire. No more and no less.

• This gate output always forces the wire to one of two states (zero or one).

• State changes occur everywhere on the wire instantaneously.

Today's Lecture Questions This Abstraction:

• Does this abstraction limit our designs too much?

• We've all taken physics and know instantaneous state propagation doesn't happen. What does happen, and how does it affect our logic designs?