Scientists have discovered time travel. John goes back in time and meets his great-grandfather as a young child. John invites the boy to see the circus. Unfortunately, there's a fire at the circus which kills the boy. What is the paradox?
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Home » English » Scientists have discovered time travel. John goes back in time and meets his great-grandfather as a young child. John invites the boy to see the circus. Unfortunately, there's a fire at the circus which kills the boy. What is the paradox?