Time Paradox

A temporal paradox, time paradox, or time travel paradox is a paradox, an apparent contradiction, or a logical contradiction that is associated with the idea of time and time travel. Temporal paradoxes fall into two broad groups: consistency paradoxes exemplified by the grandfather paradox; and causal loops.

• A causal loop is a paradox of time travel that occurs when a future event is the cause of a past event, which in turn is the cause of the future event. Both events then exist in space time, but their origin cannot be determined. A causal loop may involve an event, a person or object, or information. A causal loop is also known as a boot-strap paradox, predestination paradox or ontological paradox in fiction.

• A causal loop is a paradox of time travel that occurs when a future event is the cause of a past event, which in turn is the cause of the future event. Both events then exist in space time, but their origin cannot be determined. A causal loop may involve an event, a person or object, or information. A causal loop is also known as a boot-strap paradox, predestination paradox or ontological paradox in fiction.