**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 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?
- 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?
- What question do you ask to get into heaven, there is an angel that always lies and one that always tells the truth?
- 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?
- 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?
- 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 one door always lies and one always tells the truth, what can you ask to figure out who is who?
- 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?

- Riddle: a double ended path guarded by two guards. One ...Only one path is the right path. You can ask them one question, and it has to be a yes or no questio...
- Riddle:A man is sentenced to death but he gets to choose ...... there are two guards, one tells the truth always ... one always lies.you can ask 1 question ... freedom, with a guard at each door. One lies, ...
- Explain There are two doors and there is one guard for ...Explain There are two doors and there is one guard for each door one door leads to life and the other leads to death you have only one question to ask and one of the ...
- Riddles! - California Polytechnic State University... you may switch from your choice to the other remaining door. The question ... One of the two guards always tells the truth. ... ask one guard one question to ...
- Main/Knights and Knaves - Television Tropes & Idioms... guards. One always lies, one always tells ... door, as while the other guard (the truth ... catch that you can only ask one question. The answer given ...