Einstein told us that the speed of light must always, not only appear, but BE the same in every frame of reference no matter how fast we are moving towards or away from it. So even if you are moving at half the speed of light towards a light beam, the entire universe must conspire to either "speed up" or slow down your "time" to account for this difference.
If that makes sense to you, you are no longer sane. You cannot create scenarios of two mutually exclusive events at the same time and call that reality. This is fundamental to reason.
To show this contradiction, consider you are running away from a light beam and towards another at the same time. You move at half the speed of light. Of course in real life you will encounter the light you are moving towards first, but in Einstein's universe both beams MUST (in your world) hit you at the same time. However, in Einstein's universe, someone else will see them hit you at different times because they also MUST see light travel at a certain speed. This is just plain fucking stupid.
At best you can have an illusory effect, but to confuse that with a real difference in simultaneity is to truly give up on reason itself.
Easily. You persieve a supersonic plane flying toward you with your ears. First you hear landing near you. Then you hear sound of flight. Then, finally you hear sound of takeoff.
Yes, you persieve all sequence in reverse order. Does that mean that nothing could travel faster the sound? Absolutely not.
But when you take in account speed of observation, then everything become completely normal. Takeoff, flight, landing. Just faster than speed of sound.
Exactly same with speed of light. You can persieve landing before takoff using vision, but that does not make cause follow effect. Use something FTL to observe events of moving close or faster than light, and there will be no any "paradoxes" or whatever.
If you could use zero time information transfer, then there will be no any relativistic effects observed at all.
I already told you - you could see how information travel faster than light in your garage. No ultimately expensive instruments or devices needed.
Not at all. You could perfectly measure anything you want with "light in a vacuum" stick. Just never forget that there is always that "speed of light in a vacuum" thing. Even when you look at different ends of your stick. Especially when you look.
There is no change in quantum states of entagled particles. Say, you have two particles entagled with different spins. If you change spin of one, then you still have equivalently entagled particles, but now they entagled with same spin. (and still don't know spin of your particle.) Entaglement is not some "connection" between particles. It is guaranteed state relation that does not change if nothing done to particles pair. Simple as that. Entagled particles does not magically obtain their state on measurement, we just don't know their state before measurement, but know it is opposite (or same). Measurement destroy entaglement. This allow sharing of secret keys securely, f.e. but such sharing does not mean remote side somehow receive information from you when you measure your group of particles. Information is shared since the beginning, just both parties don't have it before measurement.
And the calibration for measurement must travel slower than light, otherwise you don’t know what to look for when measuring.
Funny, but calibration not necessary change the results of measurements. F.e. if your voltmeter is offset to a standard for whole 1V, i.e. shows 1V more than you really have, this does not prevent you from correct measurement of voltage difference.
Really, in measurements repeatability (instrument shows same result measuring same object) is often much more important than absolute precision.
Speed of travel of calibration information does not matter. What's matter is validity and preservation during transmission.
It’s not about calibration, it’s about decoding. You can’t decode the meaning of the spin-change without sending a STL message telling the other side what to look for (in the “information” imparted by the FTL change). As such, the transmission of STL information is preserved and the FTL nature of the entanglement is operationally meaningless.
Entaglement have absolutely nothing to do with any information transmission.
Entaglement is like you take a number of matches and break each in two pieces unevenly without knowing where you break a match. Matches are made so that they instantly burn down when measured and you can't make a copy. Then you send first pieces to one place and other pieces to another one by one. Resulting sequences will be "entagled". Both places will know what sequence other party received instantly when find out his own. If one receive "long-short-short-long-long" sequence, then he immidiately know that other received "short-long-long-short-short" sequence. No third party could spy on sequences unnoticeably, since match part will burn down on measurement, so recipient will not receive it.
There is no any information transfer at all between two parties. And it does not matter with what speed this pieces of matches will travel to their destinations. But both parties will know sequence of another party instantly after measuring its own.
The only sensible use for entaglement is safe sharing of random secret keys. Random secret key does not have any meaning at all. It is just random bits that could be used for further encryption.