There is no 'revealing' of the other entangled particle! That is a complete misunderstanding!
OK, call it "set" or "known".
The properties of entangled particles have *nothing* to do with dark matter or dark energy. Again, you are conflating things that are not connected whatsoever.
You don't know that, but then again, I don't know that it is either, but I've seen it suggested.
Once again, entanglement is *only* the correlation of probabilities between certain particles that were created together. That correlation persists even after the particles are separated. There is no communication between the particles. Measuring one does not 'reveal' the other. On both ends, the measurements are *completely* random. That is the nature of the quantum world.
'The paradox is that a measurement made on either of the particles apparently collapses the state of the entire entangled system—and does so instantaneously, before any information about the measurement result could have been communicated to the other particle (assuming that information cannot travel
faster than light) and hence assured the "proper" outcome of the measurement of the other part of the entangled pair. In the quantum formalism, the result of a spin measurement on one of the particles is a collapse into a state in which each particle has a definite spin (either up or down) along the axis of measurement. The outcome is taken to be random, with each possibility having a probability of 50%. However, if both spins are measured along the same axis, they are found to be anti-correlated.
This means that the random outcome of the measurement made on one particle seems to have been transmitted to the other, so that it can make the "right choice" when it too is measured.--Rupert W., Anderson (28 March 2015).
The Cosmic Compendium: Interstellar Travel (First ed.)."
What do you think is meant by local vs. non-local? What is the speed of light if time is removed? It's what Wheeler was talking about when told Feinman about his epiphany:
"Feinman, I know why all electrons have the same mass and charge."
"Why?"
"Because they're the same electron."