Noise Riddle

For Sunday reflection:

"There is an old riddle that vividly demonstrates just how noise can interfere with thinking, even when that noise is information. Imagine you are a bus driver. At the first stop of the day, nine passengers get on your bus. At the second stop, two people get off. At the third stop, four people get off, but three new people get on. What color are the bus driver's eyes?" **

-- from K.C. Cole's "The Universe and the Teacup: the mathematics of truth and beauty":
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**  Since YOU are designated as the bus driver, the eye color is the same as your own. ALL the other information is just noise.