The crocodile dilemma, Quintilian

A woman is robbed her baby by a crocodile.
This one said, "If you can guess what I'll do, I give you your baby, if you're wrong, I devour it."
The woman responds immediately: "You're going to eat him!"
The question is therefore whether the woman was right, if so, the crocodile would give him her baby, conversely, it will devour him. However, if the crocodile gives the baby because he intended to devour him, he does not speak. Since he decided to make it, the woman is wrong when she said he would eat, in this case, he should eat the baby, but if he devours the baby, it does not take word to give the baby as he had said ... The real question would be rather: do we overestimated the intelligence of crocodiles?

The barber paradox, by Bertrand Russell

A village has only one barber. A sign in the window of his shop announces: "I shaves all men who do not shave themselves, and only those."
The question is: who shaves the barber in this case? If he shaves himself, it does not follow its own rules not shave that men who do not shave themselves. So you have a choice: the barber is a liar, the barber is a woman, the barber is a prepubescent boy, the barber is beardless, the barber is God, the barber is a robot, the barber does not exist, what's a barber? What is a beard?

The paradox of duplication, Jules Henri Poincaré

Suppose that during the night, all that exists on earth has doubled in size (relatively speaking), how we would notice?
By measuring things? How, if the meters measuring tapes and doubled too? Everything on earth does it include the land itself? The answer is 42.

The paradox of the violation of the domestic law

A law said: It is forbidden to forbid. The content of the law contradicts the law itself. It is forbidden to say that it is forbidden to forbid, and therefore forbidden to say that it is forbidden to say that it is forbidden to forbid. Including?

The paradox of God and heavy rock.

If God is omnipotent, can he create a rock so heavy that he himself will not be able to lift? If this is the case and can not lift the rock, then it will not be ... The Almighty he will only ever been?
Simpson variant: is it that Jesus is able to cook a pizza in the microwave and cook to the point of making it even burning for him? A question worth asking.

The prisoner's dilemma

Two accomplices were arrested suspected of wrongdoing. The police told them that if both confess the crime, they take each for 3 years, but if one confesses the crime, it will take 10 years and the other will be free, however, if they come to s accuse each other, they will each for 15 years. Intuition would they agree, game theory argue that they take 15 years each. For all practical purposes, if you ever find yourself in this situation, know that the culprit is Obi-Wan Kenobi.

The time paradox

You travel in the past, you kill your grandfather by accident and sleep with your grandmother ... You then become your own grandfather ... What is this if not a paradox even more twisted version of the Oedipus complex ...
The paradoxical syllogism

"The more Gruyere, the more holes, the more holes, the less Gruyere, therefore, the greater the Gruyere, the less gruyere" That's it.

The paradox of the liar, for Eubulides

"I said that lies"
If my statement is true, it is false that I told lies. If my sentence is false, it is true that I said that mensonges.En 270 BC. JC. The Philetas poet died Cos insomnia obsessed with this paradox.
Good night.

The Paradox of the archer

Among my bow and my target, there are 10 meters. Once I would have shot the arrow will travel half the distance. Then again half the remaining distance. Then again half the remaining distance ... and so on, the arrow is going to go through endless distances certainly becoming shorter, but not zero. A sum to infinity of non-zero distances, but that does exactly 10 meters?