Black Box Theory and Diagnostic System of Traditional Chinese Veterinary Medicine

History of Black Box The initial idea of Black Box can be traced to two-port networks (quadripoles) that were created by a German mathematician, Franz Breisig, in 1921.1 In 1941, twenty years later, Wilhelm Cauer, another German mathematician and scientist, applied this idea in electronic circuit theory.2 Norbert Wiener, an American mathematician and philosopher, defined a Black Box to be an unknown system that was to be identified using the techniques of system identification in 1948.3 Since then, the Black Box theory has been widely applied to philosophy and science.