Tina wants to go upstairs via the mezzanine. As the pathway is dark, she turned ON the light and climbed up. Since the mezzanine light is operated by a 2 way switch, she turned it OFF when she went up. At this point, both the switches are turned in the same direction.
Narrate the story using logic gates.
Saturday, 20 October 2012
The Staircase
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