In the early days of electricity, controlling a light was a simple, private affair. You flipped a switch on the wall, the filament glowed, and the room filled with light. But as buildings grew taller and hallways stretched longer, a problem emerged: the staircase .
At that exact moment, Mr. Moreau is on the 4th floor, carrying a heavy box. The stairwell goes pitch black. He stumbles. He curses. The logic failed him because it didn't know someone new needed the light. logi escalier
Mrs. Dupont goes down to get her mail. She presses the button on the 2nd floor, the light turns on for 60 seconds. She retrieves her mail and returns to the 2nd floor in 45 seconds. The light is still on. She enters her apartment. Fifteen seconds later, the timer ends, and the light turns off. In the early days of electricity, controlling a