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What can Star Trek teach us about philosophy?

The Star Trek problem 16th October 2010

David Edmonds’s discussion of the “fat man” scenario (October) reminded me of a well-known Star Trek episode, “The City on the Edge of Forever.” Captain Kirk and Spock go back to 1930s New York to undo a change in history accidentally caused by McCoy, after using an alien time portal. McCoy saved a woman called Edith Keeler from dying in a traffic accident. But if she lives, she will form an influential pacifist movement that…

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