And, once they go back in time, that means that knowledge of time travel will immediately travel back further and further in time as well. So early and earlier times will be exposed to it"
What if it becomes possible to visit the past without the visitor's presence being visible to those who live in the past. In other words, what if right this moment a time traveler is standing immediately beside you?
If the visitor could prevent his presence from being known, why then would the past necessarily be altered by that visit?
What does that do to your contention that the "feedback loop" is a given?
p.s. I realize that this thought contradicts what I said in my third post to this thread (on page 1). But that post is now in the past. And my thinking has now evolved beyond that.
Completely aside from the above, I'm curious about something else. What's your take on this phenomenon of so many of us from all walks of life claiming to be witness to what they believe and describe as being "unidentified" (flying "saucers", lights, "beings", whatever form it takes)?
Do you believe that each and every one of these claims is either insincere or mistaken? And that not one of these people has actually been witness to something for which there is no current human understanding?
Or do you believe otherwise? If so, can you explain?