Is time travel Impossible Because time Doesn't Exist?

[Anomalocaris]

Circular reasoning.

Ummm. No. No reasoning required. The premise is that the past doesn't exist anymore by definition. We can't visit something that doesn't exist.

I don't "assume" time travel is impossible. I UNDERSTAND that actual time travel is impossible. Someone could move through space and say space and time are one, and then say they are "travelling through time" but to suggest they are time travelling as in actually visiting a time that is by definition no longer existent would just be utter bullshit and an equivocation.

And the whole point is science can't touch this because science only deals with how we experience the world, it deals with phenomena as opposed to noumena. Science never does and never has dealt with objective reality because it can't even prove objective reality. And unlike what many say, science doesn't even have to assume objective reality. Science merely has to assume that we experience a shared world and it collects evidence of our shared experiences. Science by definition can never know "whatever is out there outside of our experience" because science only tests what we experience. All the theory and mathematics is based on empirical observations, and the tools we use require our own senses to operate. And all the calculations are calculations regarding our experience of the world and not the world itself.

You understand? How cute.

Yes, in our present our past no longer exist,  but so what?  During the past, our present doesn't exist either.  Yet tomehow that past evolved into our present.  That is what we call progress of time.  Laws of physics described what is possible in the present from the perspective of the past. But these same laws that allow the evolution in one direction also allow the process to be retraced backwards at any point.  Thus they say the past is possible from the present just as the present had been possible from the past.  So laws of physics seem to permit our present to evolve once against into our past, so our past would once against exist, while present no longer exist.  This would be traveling backwards in time.