Designer;
First off, you are assuming that I am a physicist, and have more or less stated that it is your belief that nay time traveler must be well-versed in such things. That is akin to assuming that any passenger on a jet would be able to tell you how it is desgined, as well as discuss the principles of aerodynamics that are pertinent.
Also, one forgets that physics, in general, is a mathematical description tha tmore or less accurately predicts the outcome of physical events. Newton's physics reigned for a very long time, einstein's adaptation of them proved Newton to be 'wrong', or at least not as accurate as his vision. It has been known, even in my childhood that Einsteian physics arenot entirely correct as well. When one starts holding a certain manner of description to be a solid truth, that is when heads collide. And is C=ME^2 correct? It is pretty much known that using the speed of light as a constant doesn't hold up to meticulous observation, so it may be just as correct as what I know to be true.
And bringing up Titor is, in my opinion, laughable. So he had pictures, and even a manual! Anybody that has as full of a grasp of quantum mechanics and other things should know that if a well of gravity is so strong that it is bending light, the the entire field of view would be distorted, or the camera view would also be in the gravity well and the laser line would appear to be straight.
Likewise, any proof, had I actually known I would have this many nanos to kill, that I might have brought along would immediately be discarded as a fraud anyway. If I break open my beacon (which is in a watch casing of this era) and get a picture of it, it would immediately be dissected. The main thing I see is that everyone wants to believe that there are travelers here, but are not ready to accept that. I imagine that anything short of experiencing it for oneself would convince them otherwise. If you take away Titor's bad imagery, and documents that any child with a typewriter could have made, his story is likewise, as you say mine is.
And why shouldn't my identity be permantly safe? here's a hypothetical question in the form of a conversation:
HI I'm Designer.
No, you're not, you're a fraud.
No, I'm myself, and I know about planetary motions, physics, and I have a very solid idea of whom and what a time traveler will be.
No, you are not you, you are somebody else pretending to be who you claim.
no, here's my identification
it's a fraud
No it really is my state identification, see, it was issued three years ago, there's the date.
I'm sure I could make a false ID badge, and if I were really clever I could scrounge up some plastic and put an older date on it too.
Well, here's my life story, then!
Realy? A famous science fiction author wrote something decades ago that shares lots of those same ideas, you must have read the book and are tyring to pass yourself off as this Designer character.
My point here is that there is nothing I can show you, or say to you that would convince you of what you expect I should know.
Are you yourself? Can you prove it to the satisfaction of somebody that is predisposed against that sumamry? And even if you can shwo them evidence, how can you prove the veracity of that, and so on.
I do, however, commend you for trying to find a pattern. That is, after all, how scientists go about such things.
And actually, although I have not been as descriptive as I could be, as I tend to get pretty fugazi in the late evenings, events have a T-mass, not an era in itself. But once an event is altered, it does become much more difficult to alter it again in the same fashion, or at the same juncture.
As I've said before, all events happen at the same instant, and at the same point. When I shoot anywhere I am perfectly interactive. Now eras do not have much T-mass in and of themselves, but events do.
So without trying to get very convuluted, you are incorrect as I understand things. And for you, your future hasn't happened yet, for me, mine has not either. If you're traveling down a straight road from one house to another over the hill, it does not mean that the other house does not exist simply because you can neither see it, or have yet to arrive.
That's why we use so many muses, and other quarks like myself. We come, we watch, we do our thing, and then report. I'm sure that it must pale to the lofty claims given by others. I have had my few moments of doin the exciting things, but other than bury pots in the sand and draw atention away from other events, I don't do all the fun stuff.