<human>:  How did Irving Goldberg invent the Rube Goldberg machine?
<bot>: Irving Goldberg invented the Rube Goldberg machine. Goldberg was an American engineer and inventor. He invented a wide variety of machines, including the Rube Goldberg machine. The Rube Goldberg machine is a device that is designed to perform a simple task in a complicated way. For example, a Rube Goldberg machine might consist of a person pouring a cup of coffee into a cup of milk, and then adding sugar.