What do flat Earthers think causes the "magical downward force"?

…and there are probably other ideas out there.

1. Gravity is real - but the Earth’s disk is very thick so the force is very nearly vertical.

If (1) was the case - the center of gravity of the Earth would have to be so deep down to avoid gravity pointing off at an angle when moving towards the “rim” of the flat earth that the difference in height of a mountain would be negligible and we would get very, very nearly the same gravity everywhere.

Why is squid ink safe to eat, while skunk spray is not? What makes the two liquids different from each other?

4. Gravity doesn’t exist - things are held down by air pressure.

If (2) was the case - then the acceleration would have to be EXACTLY the same everywhere - and it’s not.

They don’t know - and not all of them agree that there is a “magical downward force”.

Which document should be pointed out to a holocaust denier?

2. Gravity does not exist - the Earth is accelerating upwards at 9.8 m/s2 which seems like gravity.

3. Gravity doesn’t exist - it’s a form of magnetism that works on non-metals.

If (3) was the case - you’d have the same problems as (1) - but this weir...

Friday the 13th solar storm could bring auroras to 18 US states this weekend - Live Science

The trouble with (1), (2) and (3) is that these cannot explain why the force of gravity varies with height above sea level…less at the tops of mountains - more in valleys.

I have heard them say: