If the axis of a spin is determined by the first measurement, would using that to tell humans on Earth whether a planet light-years away is habitable be FTL communication? Depending on measurement accuracy you could have the axes of the entangled particles represent a lot of information. Up/down is random so that should leave one hemisphere worth of data points per entangled pair, e.g. pointing at a projected map of needed or coming supplies.
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Yes, that would be FTL communication, but no it is not possible to do.
To convince yourself, ask yourself: If person A measures first, which measurements can person B do, to tell which axis A measured along? Remember that after a single measurement by B, the state changes again, and unless the axis was already coincidentally the correct one, it will be different now.
If you have found something that seems to work, feel free to comment and I will discuss / give evidence as to what the issue is.
spinachflakes
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