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## Main Question or Discussion Point

1-What is the different between the Einstein equivalence principle and the Strong equivalence principle?

2-Is it possible to formulate the Einstein equivalence principle in this way?

"For every point in space time, always exist a chart / reference frame in wich the metric in that point is Minkowski and its first derivative is null"

2-Is it possible to formulate the Einstein equivalence principle in this way?

"For every point in space time, always exist a chart / reference frame in wich the metric in that point is Minkowski and its first derivative is null"