De acordo com wikia , o livro O Mundo da Roda do Tempo de Robert Jordan ( que não foi escrito pelo próprio Robert Jordan, mas baseado em notas detalhadas que ele forneceu) contém uma teoria no universo para explicar isso:
Aran son of Malan son of Senar (born roughly 50 AB) had a theory based on Ishamael being thrown out and touching the world for specific periods of time. Aran had heard claims that people had encountered him as long as forty years after the sealing of the Bore. Using lost manuscripts, Aran concluded it might have taken some time for Ishamael to be brought into the prison with the remainder of the Forsaken, and might possibly have been "thrown out" in a regular cycle.