Hi, Al,
Just another note.
When you say: "[f]or instance I'm not sure what the drawbacks of gravity or
force are" I don't think anybody is disagreeing.
Physicists do not debate the drawbacks of gravity. They do, however, debate the
drawbacks of our different *models* of gravity.
The Newtonian theory of gravitation describes it as a force whose magnitude is
subject to an inverse square law. Einstein's theories superseded Newtons,
describing gravitation in a radically different way: not so much a force as
objects following geodesics in spacetime. Both give similar results in
non-extreme circumstances. And even though we prefer Einstein's theory to
Newton's, Newton's is perfectly adequate for most applications - including
sending man to the moon.
In short, in physics we too build models, debate their merits and chose the one
that is applicable to the problem we are trying to solve.
But nobody is saying that they are without drawbacks.
Regards,
Phill
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