Types of Time Travel

Found this floating about. Seems about right to me.

McKay Captain McVey

Answers About Time Travel

While science fiction is often less “science” than “fiction”, one puzzle that has baffled authors, philosophers and physicists is that of time travel. Is it possible? If so, can you change the past? If either of those questions leads to a “no”, why not? And either way, what are the implications and how could we know?

While I haven’t spent much—read “any”—time working at an advanced particle accelerator, and have yet to publish my very own science fiction, I have studied time travel extensively from a philosophical point of view. And while I don’t claim to have a definitive answer, I can illuminate on what those answers should address. Through the course of this paper I will show what considerations need to be solved in order to answer these questions, what possible and likely answers would be, and what implications could be inferred from those likely…

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