Well, however it works, there surely is a force that defines the direction things buoy in. They don't just go willy-nilly in direction when You hold them out and let go. I call it "gravity."
I give highest probability that there is positive and negative "gravity," both very strong, but they almost cancel one another out. And that they are related to the electromagnetic forces - a third dimension, if You will. Not mass-related, per se.
Do you know the right hand rule?
Electricity - magnetism - force
So, the sun is constantly bombarding the world with energy (you can call it electricity), and there is a magnetic field around the earth. And so, there will be a force created.
This force, we call gravity.
There are people who levitate when they meditate.
Changing their inner resonance changes their voltage so they float.
And, everything in the universe is a push-pull pair.
So, indeed, there may be a negative gravity.
Imagine if their is a firmament… umm, in this idea, a glass ceiling, that produces a downward force. It might be negative gravity, pushing us down, instead of positive gravity from the earth pulling us down.
In the Chinese character for 1,2,3
they are each horizontal lines.
1 is one line, and is heaven
2 has two lines, the top is heaven, the bottom is earth.
3 has three lines, and the middle one is man
Maybe the force downward is because of "heaven" (not the place you go when you die) and earth form a structure that is gravity, and keeps the air around us, and all kinds of other things.
Sooo, after all that though, i know nothing.
An interesting take, though I give very low probability to the "firmament..." But overall that makes sense.