No light bulb(s) in staircase
Why doesn’t it work well?
Can be dangerous
Why is it dangerous?
Because you cannot see where you are going
Why can you not see where you are going?
Because there is no light bulb slot to put a light bulb anywhere in the ceiling.
Why is there no light bulb slot in the ceiling?
Because it was poorly designed
Why is it poorly designed?
The workers did not think to have lightbulbs in the staircase