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I present u the ultimate proof that Jack actually caused the incident.

First thing's first:Let's Review The grandfather Paradox for those who don't know it.

"Say u invent a time muchine u go back in time and accidently kill your grandfather before he meets your grandmother then u would have not been conceived therefore u don't invent the time muchine and u don't kill your grandpa so u are conceived which Allows u to invent a time muchine and kill your grandfather again so u will be stuck in an endless time loop"

This is the same deal"The incident happens in 1977 which leads to...