Riggs, Peter J.2020-06-182020-06-180100-6045http://hdl.handle.net/1885/205296It is not uncommon in time travel stories to find that the mechanism by which the time travel is achieved is not invented. A time traveller could journey to his/her own past and give the designs of the time travel machine to his/her earlier self as s/he was given the designs as a younger person. These designs never get thought up by anyone. Such a situation would conflict with the usual conception of the acquisition of knowledge. This situation is called the Temporal Epistemic Anomaly and would arise if knowledge is gained at a time prior to the information in question being transmitted but is not discovered or invented at any time. This article examines the implications of information propagating around a causal chain that is closed in time (which is required to create the Anomaly) and whether this information need have a specific origin point.application/pdfen-AUhttps://creativecommons.org/licenses/by/4.0/201810.1590/0100-6045.2018.V41N3.PR2020-01-19Attribution 4.0 International (CC BY 4.0)