The paradox of time travel in which inconsistencies emerge through changing the past.

plural of bootstrap paradox

A time travel paradox in which the consequences of an event in the future travel back in time and cause an event in the past or present, which in turn is among the causes of the first event, forming a causal loop in which each event is caused by the other.

(rare) The statistical and psychological observation that a person is prone to prefer Coca-Cola over Pepsi when they have labels, but prone to prefer Pepsi over Coca-Cola when they are unlabelled.

A paradox, related to probability, where the expected win for repeated play of a game is infinite, so it seems that a player should be willing to pay any price to take part.

(philosophy, logic) A paradox involving statements such as "this sentence is false", or "the following statement is true: the previous statement is false", which cannot be meaningfully regarded as either true or false.

Grelling-Nelson paradox

A paradox of self-reference, where, supposing that every man either shaves himself or is shaved by the barber, and the barber shaves all and only the men who do not shave themselves, then it is impossible to determine who shaves the barber.

plural of liar paradox

Alternative form of twin paradox