[The laws of physics *and the speed of light* must be the same for all uniformly moving observers, regardless of their state of relative motion. For this to be true, space and time can no longer be independent. Rather, they are "converted" into each other in such a way as to keep the speed of light constant for all observers.]

[Henceforth space by itself, and time by itself, are doomed to fade away into mere shadows, and onlya kind of union of the two will preserve an independent reality.]

Unless the above quotes by Einstein and Minkowski can be proven false, and I seriously doubt that will happen, this discussion is pointless.

Space and time are not stand alone phenomena, there is no space without time, or time without space, there is only space-time.

There is SPACE without TIME, TIME without SPACE, and SPACE and TIME, without SPACETIME.

Infinity (including infinities, infinite, and infinitesimal) closes up to and zeroes ('0' (null unity)) out in Horizon leaving local-relative finite ('1' (unity)). Finite adds and subtracts, multiplies and divides, to infinity as the 'potential' of 'infinity' (infinities, infinite and infinitesimal). The infinity that will zero ('0' (null unity)) out in Horizon leaving the finite ('1' (unity)) that will add, ... to infinity as the 'potential' of 'infinity' . . . and on and on, and on. The parallels of TIME, meaning times plural, are when TIME gets involved with infinity, an infinity of SPACE to an instant of TIME (t=0). TIME is "cause and effect," every cause being an effect as well, and every effect being a cause as well, and there can be a lot of TIME, a lot of cause and effect, in exactly the same SPACE (s=0).

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A traveler leaves the Centauri System four light years away while being observed from Earth, if he could be observed from Earth, to be four years away from leaving the Centauri System for Earth (in other words, he is observed to be four years younger than he will be when he leaves Centauri). The trip takes four years to the day, and the Earth observer observes his arrival to Earth the day he observes his leaving Centauri to the minute . . . but the traveler is observed to have aged four years in no time flat in a trip observed to have taken no time flat. All the four years of time the traveler was traveling from Centauri to Earth, the Earth observer, if he could have, was observing the traveler to prep at Centauri for his apparently instantaneous trip through a wormhole to Earth.

The observer left behind in the Centauri System vehemently disagrees with the Earth observer's observations. After all he was there to observe the traveler's departure from the Centauri System. His observation is that it took the traveler eight years to the day to make the four light years crossing to Earth, and while doing it in eight years the traveler only aged four years and the traveler's clock displayed only four years of time passage during those eight observed years of the voyage.

There is a hypothetical space station sitting at half the distance between the Centauri System and the Solar System. The observer on the space station observes the traveler to make an instantaneous trip through a wormhole from Centauri to the station, while aging two whole years in the doing (per the traveler's clock), then bogging down in taking four years to finish the trip to Earth, two light years away from the station. That observer observes the traveler now to age only two years in the long four years he observes for the rest of the trip to take, for a grand total of four years of the traveler aging (four years time passage by the traveler's clock) during the entire trip of four years -- all the time taken being in the second half of the trip -- attested to by the station agent observer.

Then there is quantum physics.