Solve this real-life problem:
Two totally sealed rooms with no windows, each with a single door.
Room A: 3 light bulbs
Room B: 3 switches, each switch corresponds to one bulb in Room A.
Rule: you are allowed only 1 visit to each Room (after which the door is shut).
Identify: which switch corresponds to which bulb?
Hint: no mathematical solution, but soluble by physical approach.
[By Arthur Ekert – Quantum Computer]
This method below is heuristic, or fuzzy logic, which is impossible to
solve with discrete deterministic math logic:
1. Enter room B (with switches):
Switch on any switch (X) for 5 mins then switch it off,
then switch on another switch(Y).
The 3rd switch (Z) untouched.
2. Enter room A (with bulbs):
The bulb with light on => switch Y
The bulb is still warm but no light => switch X
The cold bulb, no light => switch Z