'''the definition of communication：all communication'''：all of the procedures by which one mind may affect another.
'''a still broader definition of communication''': all of the procedures by means of which one mechanism affects another mechanism. '''three levels of communications problems''': Level A. How accurately can the symbols of communication be transmitted? (The ''technical'' problem.) Level B. How percisely do the transmitted symbols convey the desired meaning? (The ''semantic'' problem.) Level C. How effectively does the received meaning affect conduct in the desired way?(The ''effectiveness'' problem.)
==第二周==