Re: Steel Man of Einstein & Relativity.

Yes, it is idiotic, not only because it pretends curved space explains
the cause of gravity. This is typical of the pretentious nature of
relativity. The equivalence principle also pretends to explain the cause
of gravity and does not in the slightest. The above-cited article
discusses how Einstein modifies Newton's idea about inertial motion,
claiming that gravity is a sort of inertial motion. Since gravity causes
accelerating motion, I beg to differ. The second reason it is idiotic is
that it all rests on presuming gravity can be explained similarly to
electromagnetism. Einstein adopted this from Heaviside's 1893 work. Now
that the unified field theory has "failed" [-Britannica], there are few
grounds to pretend gravity can be explained this way. Yet some persist,
as with gravitoelectromagnetism (abbreviated GEM), attempting to find
evidence from gravity probe B. Gravity and electromagnetism have little
in common. Only that they are both forces obeying the inverse square
rule; otherwise, they are very different. One affects only some
materials, while the other affects all matter. One can be shielded while
the other cannot. Since gravity is not electromagnetism, its speed is
not c. Laplace and Van Flandern estimate its speed to be near infinite
enough to avoid any appreciable effect of angular momentum. If the speed
of gravity were c, the angular momentum would be such that the Earth
would move out twice its distance from the Sun in just 1,200 years.
Since gravity is not electromagnetism, its speed must be millions of
times that of light.