And so, the rules of our puzzle and the validity of the solution remain intact. Sarah ignored the guards’ advice, and,despite making a downward detour, she certainly didn’t die. You’re now fit to face your own two-door fate. Let’s just hope XKCD’s snarky third guard stays out of the equation. This is exactly what Sarah does in the film, but as many of you probably remember, her success is short-lived. Upon entering, she falls through a hole in the floor, which sends her cascading into the nightmarish Shaft of Hands. Many assume she simply chose wrong, but Sarah’s unfortunate mistake was one of Labyrinth law, not of logic. Tri-Star Pictures If the guard you asked is the one who lies, then he will lead you astray by telling you (falsely) that the other guard—the truthful guard—will point you towards door B. This makes door A the safe bet. If the guard you ask is the one who tells the truth, he will tell you (honestly) that the other guard—the lying guard—will point you towards door B. This makes door A the safe bet.