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Nothing is faster than C in a vacuum, but depending on the context (medium?) that can happen.

In other words, someone should name a language Cerenkov



Gravitation is slightly faster than c in vacuum.


In GR, the speed of gravitational waves is _exactly equal_ to c.


In reality, speed of light is slightly lower than speed of gravitation, because gravitation slows down speed of light.


We were presumably talking about an ideal massless space [Minkowski] in which the speed of light in a vaccuum is considered -- that is what c is defined as.




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