Even if time-travellers did travel to our time, perhaps they might have reasons for not revealing themselves to us. [...] Science fiction makes much of the fact that small changes in the past can lead to large changes in the future; perhaps it would be dangerous for future generations for time-travellers to reveal their identities to present-day folk. Maybe they were briefed about this by their leaders before setting off!
http://popphilosophers.blogspot.pt/
sábado, 27 de agosto de 2016
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