2.

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46 miles raised to the second power gives 2116 * 8 = 16928 inches * 2,54 = 42997 cm = 0,43 km = 1419 ft.
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Allowing correction of 3 m we get this result :
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... if the Earth were flat, why don't we see the entire Chicago skyline down to the lakeshore in this photo? Since we obviously see only the uppermost floors of the tallest skyscrapers from 40 or so miles across Lake Michigan, cut off by the sharp horizon of the lake surface, this photo clearly supports the spherical Earth and completely undermines the notion that the Earth is flat. Your turn. You presented this picture. You to explain it.
Any progress on this?
acenci: succinct enough for you? Feel free to answer the question above if you have one - that goes for any of you guys.
Yes, good objection. Well, I don't have a satisfactory answer yet. I think that we should also be able to see all of America and all the way to the South Pole ("all roads lead to the South Pole", as they say) but we would need a very strong telescope. Indeed, one could object why this ship is disappearing "behind" the horizon, but then you get a telescope, and it reappears:
#" class="bbc_link" target="_blank" rel="noopener noreferrer">#Panasonic SDR-H40.Zoom test Ship
So, honestly I would say that the city is all there, but just too small in terms of height to be seen, but, just like this boat, it would reappear with a telescope.
That camera has an impressive zoom range! The ship doesn't disappear over the horizon when zoomed all the way out, though; it remains right on it as it becomes smaller and smaller in the frame. In the final frames you can still see it as a barely-resolved smudge, still on the horizon.
The problem with your explanation is that only the tops of the tallest buildings are visible in cikljamas' photo of Chicago. They are well-resolved, so it's not just a matter of being too small to see, and the profiles of several indicate they are simply cut off at the bottom by the sharp lake-surface horizon. There is not even a whiff of several large, but not quite as tall, buildings between them. "Too small to see" doesn't cut it; "too short to break the horizon at this distance" does.
Here's another picture from closer in, showing many more buildings between the tallest ones. This turned up in a google search for "chicago skyline" (including the quote marks).

It's from this gallery:
http://galleryhip.com/chicago-skyline-outline-tattoo.html. I don't know who owns it, nor details like the distance to downtown. It does show more of the lower buildings but the shoreline itself is apparently still below the horizon.
However, a better objection would be: "why don't the mountains behind chicago (there must be some mountains somewhere) don't stop / block the sun from shining all over the sky?". The answer might be harder. Maybe the mountains, if they are far away, also get shorter. There is also the law of "perspective". If you are 1 meter tall and next to me, you will look taller than mount everest. In this sense the skyscrapers are taller than the mountains and all the rest that's behind them. Yes, I think I answered my own objection, too.
Yep. Mountains obviously don't get shorter as you get further from them. They are what they are. They do subtend smaller angles as the distance increases, which makes them look smaller to you - perspective. The 14,000' peaks in the Rockies, about 1,000 miles west of Chicago wouldn't be threat to block out the Sun even if the Earth
were flat.
Right now, it looks like the most reasonable explanation is the surface of the lake is convex and blocks everything but the highest parts of the tallest structures from the vantage point cikljamas' photo was taken. The convexity is generally consistent with an 8,000-mi diameter sphere working from the data provided. Y'all might want to pause your attacks and see if you can come up with a plausible way to explain what we can see in this this photo, because it sure doesn't seem to be consistent at all with a flat earth.
Since acenci now seems to be saying he's no longer willing to defend the idea that the Earth is flat, does anyone else have an explanation how cikljamas' photo of Chicago from across the lake is consistent with a flat earth? At least acenci was willing to try, so thanks to him for that.