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@Ramshutu
Frankly the existence of a horizon - on its own - demonstrably obliterates flat earth.
Kudos to Ramshutu for having the closest correct answer. Correct descriptive answer is below at 1}.
0} If we imagine Earth as finite, flat plane and the sun orbit on a curved spherical trajectory, then we would see what we do see, and that is the sun-clipse --e-clipse-- in evening by flat Earths horizon as if the sun were sinking into the Earths flat plane. That would lead to a whole other crazy mess to say that sun sinks into flat Earths plane of existence.
1} we watch a ship { with its hight mast } sailing away in distance and with a binoculars, we will see the same vision of line 0} above, with the sun-clipse, however, the ship and its tall mast, are actually on Earths ocean, --not in orbit as is sun-- and as we see what appears to be the ship sinking --via the gradual clipsing from view-- we can radio the ship and ask them, are you sinking into ocean?
Of course there not because most often these ships come back --in days before radio--- and we know they do report sinking into the ocean, ergo, there is only one logical, common sense, critical thinking conclusion, and that is, the Earth is curved, and that is why we have the appearance of the ship and mast sinking --clipsing-- from our line of sight/view.
See the diffferrence there above. Our sun is in orbit, either around flat Earth or spherical Earth, we will have the same clipsing --sinking concept-- at the line-of-sight horizon.
Yet with ship and its mast, we know the ship is on Earth, not out in space, away from the Earth in an orbit, as is the sun,
2} or course we have satelites, that, orbit the Earth and with contineous photos that also prove Earth is spherical.
e-clipise > clipse > cipping in football is foul meaning we clip-off a below the waste on their forward movment/trajectory.
Fuller states it this way, it is more accurate to say in morning we have sun-sight, and evening sun-clipse as it is being clipped off/away by the horizon.