Editing Newcomb's paradox (section)

===The meta-Newcomb problem===
Another related problem is the meta-Newcomb problem.<ref name='bostrom'>{{cite journal|journal=Analysis|volume=61|issue=4|author=Bostrom, Nick|year=2001|title=The Meta-Newcomb Problem|pages=309–310|doi=10.1093/analys/61.4.309}}</ref> The setup of this problem is similar to the original Newcomb problem. However, the twist here is that the predictor may elect to decide whether to fill box B after the player has made a choice, and the player does not know whether box B has already been filled. There is also another predictor: a "meta-predictor" who has reliably predicted both the players and the predictor in the past, and who predicts the following: "Either you will choose both boxes, and the predictor will make its decision after you, or you will choose only box B, and the predictor will already have made its decision."

In this situation, a proponent of choosing both boxes is faced with the following dilemma: if the player chooses both boxes, the predictor will not yet have made its decision, and therefore a more rational choice would be for the player to choose box B only. But if the player so chooses, the predictor will already have made its decision, making it impossible for the player's decision to affect the predictor's decision.