I find it highly ironic that Avi Loeb, of all people, largely assumes the role of a debunker here and demands evidence, given that he himself is the guy who stated — without a shred of evidence — that
Uma Thurman Oumuamua was an alien probe.
I've explained this a few times already. We are not actually living inside a black hole, but for all intents and purposes, one could regard our universe as such due to the expansion of the universe at the edges happening faster than the speed of light, just as the escape velocity of a black hole is also greater than the speed of light.
Just as with Einstein's metaphor of the elevator in which the experience of gravity is indistinguishable from acceleration — and indeed, gravity
is an acceleration — our relative position in spacetime with regard to the outer edges of the expanding universe is indistinguishable from being inside the event horizon of a black hole — in both cases, we cannot look beyond the event horizon. Inside the event horizon of a black hole, time becomes a spatial dimension, and this appears to be the same near the edges of the expanding universe.
I agree that the term "holographic" is indeed a poor choice of words here. But as far as interdimensional physics are concerned, yes, I'm fully onboard with there being an interdimensional aspect to the way some of these objects travel, and definitely to the sightings of objects that appear non-solid and/or morphing.
If it morphs, then that's a solid indication that the object being observed is only the intersection of a higher-dimensional object with our "3+1" spacetime. And considering that we're with the utmost certainty talking of vessels made up of tangible matter — and thus, particles with a rest mass — which can travel interstellar distances in a non-relativistic way, there is no other option than that there would be some interdimensional factor involved.
Nothing with a rest mass can even attain the speed of light, because it would require an infinite amount of energy over a finite time of acceleration, or a finite amount of energy over an infinite time of acceleration. But even then still, if that were possible, then there's also the fact that anything made of matter and attempting to surpass the speed of light by relativistic means would by definition disintegrate as a result of the fact that the forces holding atoms and molecules together work
at the speed of light. In addition to that, there would as such also not be any possibility for the pilot(s) to control the vessel by way of either electronics or optics, because they too would only work at the speed of light.
As such, there are only a few ways that anything could be traveling at a velocity
perceived to be faster than the speed of light — "perceived" in the sense that the object would be traversing a certain distance in less time than it would take at the speed of light in a vacuum — and all of them involve higher-dimensional physics, i.e. ...:
- warping spacetime as theorized by Miguel Alcubierre;
- a shortcut between two points in spacetime by way of a tunnel that itself runs through a higher-dimensional hyperspace — i.e. a wormhole, also known as an Einstein-Rosen bridge;
- quantum teleportation;
- if brane theory — a variant of string theory — is correct, shifting from one brane onto another, which is in fact analogous to the wormhole in that it's a shortcut and that it requires a hyperdimensional hyperspace.