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

I have heard them say:

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

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

Why do most atheists in debates with theists take Bible verses out of context much of the time? Are they lying maliciously or do they not understand theology enough to understand the meaning?

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

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

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

Why do people keep denying the similarities between Latin and Italian by saying they are totally different languages when it’s obvious they sound similar?

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.

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

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

Republican Trump is a billionaire, president, won't be held accountable for multiple felonies, and pretty much has whatever he wants. So why is he always whining and crying about stupid, pointless stuff? Is he incapable of happiness?

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.

…and there are probably other ideas out there.