Some of them resurrected during the "neutral point" debaucle.
There is one notion of a neutral point computed from static gravitational factors, assuming stationary Earth and Moon.
There is another notion of neutral point involving orbital motion, a la the Langrange points.
And there is yet a third notion of neutral point deriving from the patched-conic trajectory design.
These methods of computation naturally arrive at different results because they represent different physical concepts. If you take the result of one method and pretend it's the result of another method, and then you compute the other parameters (e.g., the mass of Earth or Moon) for that misplaced method, you can inappropriately construct a "proof" that those parameters are different than previously supposed.
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