People don’t know how to use a lift. When they wait for a lift, they are not aware of which button (Up Arrow or Down arrow) to press. People give instructions to the lift. When the lift is in some top floor and they want to go up, they press the “Down” button instructing the lift to come down.It is sufficient to press the button based on where you want to go to. If you want to go up press “Up” button else press the “Down” button. The lift will just need to know where you want to go, they too don’t like getting instructions.
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