So flat earthers usually say gravity effects are explained by density

And that gravity is essentially an unproven theory

Which is wrong, as in a vacuum chamber a hammer will still fall

So can you explain to me how it is that gravity is strong enough to hold the oceans down but allows a fragile butterfly to fly?

Because a butterfly has most of its surface area dedicated to resisting gravity.

Its wings flap, thrusting air downwards, and as each action must have an equal and opposite reaction, it is propelled upwards.

This is possible as it's an insect, and thus weighs very little, meaning that gravity has less of an effect on it.

So for me the most compelling evidence of flat earth is the cases where an object or building or land mass is clearly visible from a distance such that it should be concealed behind the curve

Usually accomplished from a height.

France is visible from the top of the cliffs of Dover, but not on the beach below.

https://images.app.goo.gl/zjTnsXSDazfGq9Wa7

Just as an example

I've seen many examples

There's no image there.

Hmm

if u have images u can send them to me and i will post them for u

Images are usually non-productive.

i'm just saying ;-;

k.

https://images.app.goo.gl/zjTnsXSDazfGq9Wa7

Yeah still no image

Ah, I see. The redirect link.

It links to a presentation with no sources for its claims.

You can see a YouTube video where they seem to prove the issue with the Chicago skyline

But if indeed the buildings are visible that should be well below the curve

It raises a question

Where were they looking from?

How high?

And how far away?

From the beach /ground level

I need a source for that, the video as well.

And, in that slide presentation, the claims of the "flat earth map" being used by governmental organizations and mapping authorities are false, as that's just an alternate depiction of the standard map we see today. Which is a map of Earth presented in 2d format.

There's quite a few different videos of the Chicago skyline

https://youtu.be/8P_Bm_8xiWs

There can't be that much curve in the way.

What's the height of the vantage point?

The other thing I find interesting is super long bridges made without accounting for curvature

https://youtu.be/P1xuz-zNy1A

Also, the mirage effect is real.

http://www.whale.to/a/13271_1145796812113309_8079385559108134732_n.jpg

Wait so uh what side are u guys arguing for?