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As they began to take in data, they recognized the connection between the traffic light and the flow of cars. When the traffic light was red in one direction, it was green or yellow in the other. Green or yellow meant you could go, red that you had to stop. After studying thousands of cars using sophisticated computers, they were congratulating themselves for "cracking the code." They now knew the law of the traffic light: The flow of vehicles is controlled by the traffic light. |
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