**The Truth** may refer to:

It is also used as a title for creative works and a nickname for individuals:

A **logic puzzle** is a puzzle deriving from the mathematics field of deduction.

**Knights and Knaves** is a type of logic puzzle.

On a fictional island, all inhabitants are either knights, who always tell the truth, or knaves, who always lie. The puzzles involve a visitor to the island who meets small groups of inhabitants. Usually the aim is for the visitor to deduce the inhabitants' type from their statements, but some puzzles of this type ask for other facts to be deduced. The puzzle may also be to determine a yes/no question which the visitor can ask in order to discover what he needs to know.

**Raymond Merrill Smullyan** (born May 25, 1919) is an American mathematician, concert pianist, logician, Taoist philosopher, and magician.

Born in Far Rockaway, New York, his first career (like Persi Diaconis a generation later) was stage magic. He then earned a BSc from the University of Chicago in 1955 and his Ph.D. from Princeton University in 1959. He is one of many logicians to have studied under Alonzo Church.

Algeria · Nigeria · Sudan · Ethiopia · Seychelles

Uganda · Zambia · Kenya · South Africa

Afghanistan · Pakistan · India

Nepal · Sri Lanka · Vietnam

China · Hong Kong · Macau · Taiwan

North Korea · South Korea · Japan

Malaysia · Singapore · Philippines · Thailand

- Can you answer this riddle. There are two doors and two guards. one guard always lies and one always tells the truth. Asking only one guard, how do you choose which door?
- What is the question to ask the guards when one always lies and one always tells the truth?
- If one door always lies and one always tells the truth, what can you ask to figure out who is who?
- If there are 2 doors, and one leads to heaven, and one leads to hell, and there are guards in front of each door? If one always lies and the other always tells the truth, what question should you ask in order to find out who is telling the truth?
- If You're in a room with two doors and two gate keepers. One gate keeper is always lies one always tells the truth you can ask one question. What and whom do you ask?
- When A guy is in a room with 2 doors 1 leads 2 happiness the other leads to a dreadful place one door always lies the other always tells the truth, but the guy doesn't know which one, what question should he ask to go out the door that leads to happiness?
- If you can only ask one question to escape when 2 doors lead to freedom and the other to doom. There are 2 guards one lies and one tells the truth?
- Can you ask the guard to find the good door two doors. one good one bad. they're both guarded. one guard tells the truth. the other lies. what one?

- Two Guards, Two Doors riddle? - Yahoo... with two doors as the only exit. One door leads to ... If you ask the guard who always tells the truth, ... or death riddle.? There are two guards ...
- 2 guards - Experts-ExchangeHe can leave through 2 doors. one door leads to freedom ... you can ask any one of teh guards 1 question ... one always tells the truth and the other lies, ...
- A puzzle of identical twins - Cut-the-KnotA puzzle of identical twins: Suppose there are two identical twin brothers, one who always lies and the other who always tells the truth
- Door to Heaven (Riddles). Zuzzle.com: Puzzles, Riddles ...There are two doors. One door leads to heaven, ... one by each door. One guardian always tells the truth, and the other guardian always lies. What one question can ...
- Two doors, two guards, one question.Two doors, two guards, one question. ... one guard always tells the truth and the other one always ... to the door of death. If you ask the guard who always lies, ...