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One [B]ox or Two [B]oxes
P [B] Ogre

A person is playing a game operated by the Predictor, an entity somehow presented as being exceptionally skilled at predicting people's actions. The exact nature of the Predictor varies between retellings of the paradox. Some assume that the character always has a reputation for being completely infallible and incapable of error. The Predictor can be presented as a psychic, as a superintelligent alien, as a deity, etc. However, the original discussion by Nozick says only that the Predictor's predictions are "almost certainly" correct, and also specifies that "what you actually decide to do is not part of the explanation of why he made the prediction he made". With this original version of the problem, some of the discussion below is inapplicable.

The player of the game is presented with two opaque boxes, labeled A and B. The player is permitted to take the contents of both boxes, or just of box B. (The option of taking only box A is ignored, for reasons soon to be obvious.) Box A contains $1,000. The contents of box B, however, are determined as follows: At some point before the start of the game, the Predictor makes a prediction as to whether the player of the game will take just box B, or both boxes. If the Predictor predicts that both boxes will be taken, then box B will contain nothing. If the Predictor predicts that only box B will be taken, then box B will contain $1,000,000.

By the time the game begins, and the player is called upon to choose which boxes to take, the prediction has already been made, and the contents of box B have already been determined. That is, box B contains either $0 or $1,000,000 before the game begins, and once the game begins even the Predictor is powerless to change the contents of the boxes. Before the game begins, the player is aware of all the rules of the game, including the two possible contents of box B, the fact that its contents are based on the Predictor's prediction, and knowledge of the Predictor's infallibility. The only information withheld from the player is what prediction the Predictor made, and thus what the contents of box B are.
Predicted choice Actual choice Payout
A and B A and B $1,000
A and B B only $0
B only A and B $1,001,000
B only B only $1,000,000

The problem is called a paradox because two strategies that both sound intuitively logical give conflicting answers to the question of what choice maximizes the player's payout. The first strategy argues that, regardless of what prediction the Predictor has made, taking both boxes yields more money. That is, if the prediction is for both A and B to be taken, then the player's decision becomes a matter of choosing between $1,000 (by taking A and B) and $0 (by taking just B), in which case taking both boxes is obviously preferable. But, even if the prediction is for the player to take only B, then taking both boxes yields $1,001,000, and taking only B yields only $1,000,000—taking both boxes is still better, regardless of which prediction has been made.

The second strategy suggests taking only B. By this strategy, we can ignore the possibilities that return $0 and $1,001,000, as they both require that the Predictor has made an incorrect prediction, and the problem states that the Predictor is almost never wrong. Thus, the choice becomes whether to receive $1,000 (both boxes) or to receive $1,000,000 (only box B)—so taking only box B is better.

In his 1969 article, Nozick noted that "To almost everyone, it is perfectly clear and obvious what should be done. The difficulty is that these people seem to divide almost evenly on the problem, with large numbers thinking that the opposing half is just being silly."

If the player believes that the predictor can correctly predict any thoughts he or she will have, but has access to some source of random numbers that the predictor cannot predict (say, a coin to flip, or a quantum process), then the game depends on how the predictor will react to (correctly) knowing that the player will use such a process. If the predictor predicts by reproducing the player's process, then the player should open both boxes with 1/2 probability and will receive an average of $251,000; if the predictor predicts the most probable player action, then the player should open both with 1/2 - epsilon probability and will receive an average of ~$500,999.99; and if the predictor places $0 whenever they believe that the player will use a random process, then the traditional "paradox" holds unchanged.


Only defeated by a thunderstorm, they had to concede in purpose of saving my internet connection. Good job guys!
New Team Page Beta
Player Ma St Ag Av Skills Inj G Cp Td It Cs Mvp SPP Cost  
1
Newcombs Paradox
Ogre
5 5 2 9
Bone-head, Mighty Blow, Thick Skull, Throw Team-Mate
Guard
   7 0 1 0 3 1 14/16 160k
(140+20)k
  
2
Immanuel Kant
Ogre
5 5 2 9
Bone-head, Mighty Blow, Thick Skull, Throw Team-Mate
   1 0 0 0 0 0 0/6 140k
(140+0)k
  
3
Free Will
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
   1 0 0 0 0 1 5/6 20k
(20+0)k
  
4
Prisoner's dilemma
Ogre
5 5 2 9
Bone-head, Mighty Blow, Thick Skull, Throw Team-Mate
Guard
   7 0 1 0 0 1 8/16 160k
(140+20)k
  
5
Utilitarianism
Ogre
5 5 2 9
Bone-head, Mighty Blow, Thick Skull, Throw Team-Mate
Guard
   7 0 1 0 3 0 9/16 160k
(140+20)k
  
6
Thomas Hobbes
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
   0 0 0 0 0 0 0/6 20k
(20+0)k
  
11
John Rawls
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
Side Step
   7 0 0 0 1 1 7/16 40k
(20+20)k
  
12
John Locke
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
   7 0 1 0 0 0 3/6 20k
(20+0)k
  
13
Thomas Hobbes
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
Side Step
   4 0 2 0 1 0 8/16 40k
(20+20)k
  
14
Nietzsche
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
Side Step
   7 1 2 0 0 0 7/16 40k
(20+20)k
  
15
Karl Popper
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
Side Step
   5 0 1 0 0 1 8/16 40k
(20+20)k
  
16
The Butterfly Effect
Gnoblar
5 1 3 5
Disposable, Dodge, Right Stuff, Side Step, Stunty, Titchy
   0 0 0 0 0 0 0/6 20k
(20+0)k
  
12 players  
Coach: East Re-Rolls (140k): 1  
Race: Ogre Fan Factor: 12  
Current Team Value: 940k Assistant Coaches: 0  
Treasury: 60k Cheerleaders: 0  
Team Value: 1100k Apothecary: Yes  

Games Played:7 (4/2/1) |TD Diff:7 (10 - 3) |Cas Diff:-2 (8/4/1 - 8/5/2)
Last Opponent: Bone Head Athletic
Opponent#RecordTDCasTV
 W/D/LAvgAvgAvg diff
Vampire20/1/10.5-1.00.5   1.5   0.0-0.0   0.0   0.030k
Human11/0/02.0-0.00.0   0.0   0.0-2.0   1.0   1.010k
Norse10/1/01.0-1.02.0   0.0   1.0-4.0   1.0   1.080k
Nurgle11/0/02.0-0.01.0   0.0   0.0-1.0   0.0   0.0-40k
Ogre22/0/02.0-0.02.0   0.5   0.0-0.5   1.5   0.0-20k
Total74/2/11.4-0.41.1   0.6   0.1-1.1   0.7   0.310k