Certainly I believe that the earth is flat. It's been demonstrated repeatedly through experiment beyond any reasonable doubt.
Hmm, okay. Here are a few objections that immediately come to mind. There are four times zones in the US. On the east coast, the sun rises from below the horizon first; an hour later, those in the central time zone see it rise; an hour after that, those in mountain time see it rise, and lastly, those on the west coast see it rise from below the horizon. If the Earth were flat, everyone in the country would see the sun rise at the same time.
Second, if the sun is in the sky in one time zone, everyone on the flat Earth would see it. If it was light in one location, it would never be dark in any other location.
Now, if you reply to the second objection by arguing that the sun shines like a flashlight, in the sense that it shines light directionally, with only a circular portion of the flat Earth lit up, this is my reply: if the sun's light is directional like a flashlight, it would not appear to rise from below the horizon, but would pass overhead and immediately light up that portion that came into the circle of its directional light, just like a flashlight immediately lights up that portion of the ground that it shines on.
In addition, the reason directional light is directional, is because something is blocking it in other direction. Light itself shines in all directions at the same time. The reason a flashlight shines the way it does, is because the light bulb (that shines in all directions) is tucked away into a casing that only allows the light to escape in one direction. Do you believe the sun is a light that is tucked away in a casing that prevents it from shining in all directions? If not, it would never happen that one location on the Earth is dark while another sees the sun high in the sky.
And if the sun was tucked away in a casing that only allowed it to shine on a circular portion of the Earth, while always being high in the sky above the flat Earth, you would never see the full circular sun just above the level of the horizon.
Those are my objections. What are your answers?