If one could travel back in time, would it be possible to interact with persons/events or only to ob

Many time travel movies have been produced, fascinating many sci fi fans for years. My question is whether it is possible to interact with people, places, and events and affect outcomes in the future from that time or rather that our role would be merely that of an observer, having read a book that had been written but cannot be edited.

If one could travel back in time, would it be possible to interact with persons/events or only to observe?opera mini

When we watch a video we are observing the past but we cannot interact with it.

If we could interact with the people in the video we could, conceivably, create a paradox (if it were possible to create a paradox, which it is not).

A paradox is an impossible state of affairs, and it is not possible to create one.

Because it is impossible to create a paradox, it is also impossible to interact with the past in any way, with the exception of observing only.

So, to recap: Interacting with the past would inevitably create paradoxes, but paradoxes are impossible, so, interacting with the past is also impossible.

Contrary to popular belief, traveling at greater than light speed will not make you go back in time.

For example,

Alpha Centauri is 4.2 light years away.

But let's say that I travel to Alpha Centauri at four times the speed of light.

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If one could travel back in time, would it be possible to interact with persons/events or only to ob

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