Here's a nice presentation from him that has diagrams of how the basic logic circuits are built up using this approach: http://cba.mit.edu/presentations/03.09.

Here's a nice presentation from him that has diagrams of how the basic logic circuits are built up using this approach: http://cba.mit.edu/presentations/03.09.Vigoda.ppt http://cba.mit.edu/presentations/03.09.Vigoda.ppt