Answer: Logic Lights #126

The lamp is ON. It lights up!

Gate by gate

1. NOT B → NOT ON = OFF
2. A OR NOT B → OFF OR OFF = OFF
3. C OR D → ON OR OFF = ON
4. (A OR NOT B) OR (C OR D) → OFF OR ON = ON

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 = True
C = True
D = False

lamp = (A or not B) or (C or D)
print("Is the lamp on?", lamp)

When you run it, it prints:

Is the lamp on? True