Contrary to popular belief, and certain speculations here, the plain simple fact is, ther ARE no paradoxes. There never have been and there never will be. The term itself is an oxymoron and an invention of the intellect of the human mind, in search of creative thought and outright fantasy. The Universe exists without either the need for, or possibility of them.
Once one comes to this simple realization, one can then put the concept of “Time Travel” in IT’S proper perspective. Namely, that as is usually thought of, it doesn’t exist. Never has, never will. For the simple reason that our invented concept of time itself is fundamentally flawed. Time is not an entity. It is a unit of measurement invented by man, to define the interval between cause and effect. Like Meter. Or Yard. Or Foot. Or pound. Can we “Meter” travel? or “Foot” travel? Or perhaps “Acre” travel? Gets silly doesn’t it. Why does anyone think you can actually “Time” travel?
Interesting that the so called “Twins Paradox” was not discussed in depth here, but then it’s really not a paradox at all. It is only beleived to BE one by people who do not understand the simple laws of physics and the Theory of relativity.
If anyone is interested, I can show you how it CANNOT be a paradox. Unless you already know. In which case you wouldn’t be here speculating on the “how” of something that doesn’t exist in the first place.
It isn’t that Time Travel is not possible, it’s that there is NO SUCH THING in the first place. Never has been. Never will be. Like the Gods of MT. Olympus. Or the Fire Breathing Dragons of old. And Pegasus. Or the Earth as the Center of the Universe. It’s mythology. Based on INNOCENT ignorance. It’s a skewed concept created by a lack of understanding of the fundamental Theories of relativity (General and Special), in the first place.
And it doesn’t require “Multiple” Universes to solve. If there are multiple universes, than there MUST be an INFINITE number of them. In which case, all things that have ever happened, will happen, are happening Now. If THAT’S the case, what makes anyone think they have anything resembling free will at all?
Alas, I’m afrid even THIS attempt to resolve the so called “paradoxes” of Time Travel is also a pursuit in search of what is a non-existant problem in the first place. Another lapse into inventing a new mythology.