Okay, Scepti, hear this.
Basic Explanation of Earth.
Regardless of RE of FE, things fall, right? What makes them fall? Obviously, something gives them "weight". That thing is what Newton calls gravity. He said that something makes things fall down.
CHECKPOINT ONE
So far okay? Now. The UA says that the "earth-plane" is accelerating upwards. This accounts for the falling force. Gravity says that everything is attracted to everything. Thus the earth is pulled into a ball and every piece of matter is forced against the ball. Including you. This could also account for the falling force.
CHECKPOINT TWO
What does UA explain? It explains why there is a falling force mentioned above. Gravity also does that. HOWEVER, gravity also explains stars, moons, planets, asteroids, black hols, supernovae, elements...
CHECKPOINT THREE
Therefore, gravity is a better explanation than UA because it explains more.
If you have an objection (which you probably have), state which checkpoint you got to before a flaw in my logic occurred.