The lamp is OFF. It stays dark!

Gate by gate
- B AND C → OFF AND ON = OFF
- A AND (B AND C) → OFF AND OFF = OFF
The same circuit in Python
Python has the same three gates built in: and, or and not. ON is True and OFF is False.
A = False
B = False
C = True
lamp = A and (B and C)
print("Is the lamp on?", lamp)
When you run it, it prints:
Is the lamp on? False
Try it: change one of the switches from True to False (or the other way round) and run the code again. Can you find a switch that changes the lamp?