The closest part of the French coast is around 300 miles from Manchester. So he could see that provided he can find a 60,000 foot mountain in the Manchester area.
Had you ever been to the seaside you would know that is wrong, telescope or not. Clear day, perfect weather, look at a boat going out to sea. You’ll note that long before it vanishes from your sight entirely, soon enough you’ll keep seeing the superstructure & masts while the waterline has disappeared - that’s not because the boat is sinking, merely gone beyond a distance where the curvature of the globe gets between your eyes and it.
If the Earth is flat, why can you get from London to Tokyo with a stop at either LAX or Moscow ? Why does the shortest/most fuel efficient flight path from Europe to the US go over Greenland rather than in a straight line ?
I’ve been to the highest pub in England, which is in the Pennines, it is rather a bit short of 60,000 feet. Bloody miserable up there however. Very nice beef pie made up for it. Plus real ale. 
Yes, you’re right, the Earth is flat. Flat as a professional female volleyball player. Also, as a direct result of the flat Earth, our organs orbit about the spleen as we get older.
Welcome to the board, I love like minded people coming here.
Ooh, finally I have my chance.
So…is the Earth itself falling?
Can material fall off the edge of the earth / can clouds drift away from the plane?
Thought of another one : show us a picture of the edge of the world. Looking down over the edge, if possible.
ETA : oh goddammit, **Mijin **!
Another one would be the existence of time zones. If the Earth is a flat disk, then the Sun vanishing below the edge’s horizon should plunge the whole disk into darkness at once. Converserly, if the Sun always stayed above the disk, there would never be a night time at all.
But it doesn’t and instead you can wake a Japanese person up in the middle of the night by calling them at Manchester’s noon ; and if you fly fast enough you can outrun the night/chase the Sun - in fact SR-71 pilot Brian Shul wrotein his memoirs that he once saw the Sun rise in the West, because their plane was going so fast it actually caught up with the Sun.
The sun dims at night.
Yes, I know, which is why the Belgian/Polish joint space program figured they could land on the Sun provided they launched late enough. It should still dim for everyone on the disk at the same moment.
I dare ya to make timezones work on a flat disk without resorting to Pterry’s handwave that light moves more slowly on Discworld due to the Disc’s heavy magical field 
One thing to watch out for is that the atmosphere, being denser closer to the surface, can act as a lens and bend the light a little bit around the curve. The flat-earthers can trot out pictures of cities on the horizon that you shouldn’t be able to see, but you can, because of air density effects. There’s a notorious one they use of the Chicago skyline taken across Lake Michigan, when you wouldn’t expect to see it, except that the air over the lake is acting like a lens because of density variations.
Also, when we see the Sun or the Moon setting over the horizon, it’s actually already around the curve because of that.
I would think that airline pilots would do this all the time, because when they fly from Europe to the US, or from the US to Japan, they’re going on a great circle route near the polar regions, and the speed you have to go to be going faster than the Earth’s rotation is lower. For example, I’ve flown from Los Angeles to Tokyo, and the flight goes up around 60 degrees north latitude. At that latitude, you have to go only half as fast as you would at the equator to see the sun rise, about 500 mph.
I think the Chernobyl disaster was more melt than sever.
That’s because the earth isn’t just ONE flat surface, it is SEVERAL flat surfaces. In fact, the earth is a cube. It is the little known but revolutionary Cubist Theory of planetary development that will eventually sweep away the stifling and short-sighted 2-dimentsional flat earth theory.
Foolish. Everyone knows the earth is a dodecahedron.
Funny thing, I was looking at the Moon with my telescope (yes I know, the Devil’s instrument) over several days, and noticed that depending on where you looked, some mountains would cast shadows and others wouldn’t. The lengths of the shadows would change, but there wasn’t a time where all the mountains cast a shadow. It’s almost like the Moon is spherical or something.
Life provides a series of lessons that get repeated until you learn them. One lesson is to not waste your own time arguing about stupid things.
You are thinking of mercator-flat; the traditional FE model uses a pizza-Earth, where the North Pole is the central point and Antarctica is the ice-wall crust that holds back the oceans. In this model, the straight-line paths of travel from, say, London to Tokyo render as curves when traced on a Mercator-style map.
Unfortunately, the shortest path from Quito to Singapore on the pizza map goes approximately over the North Pole; to use the equatorial route (which is about the same distance on a globe), one would have to follow a much longer curve. In fact, Quito and Singapore are nearly perfectly antipodean to each other, so almost any route you could fly straight between them would be very close to the same distance.
These FE anomalies have rifted the CommuniTy, so a new kind of theory has come into development. It is commonly described as the “Pac-Man” model because it relies on spacetime anomalies to maintain as consistent map: when you approach an incontinuity/noncontiguity in the map, some sort of wormhole type thing transports you to the opposite side.
There is no “edge”, as such, just a web of crossovers where you mysteriously end up on the other side of where you came from. In this way, the greater shape of the Earth could be any kind of polygon (it could have the biblical “4 corners), some other traceable shape or even no shape that could be described by Cartesian math.
More research will be needed for the PMFECTs to determine how their model is actually laid out, but I suspect they will discover something that explains the globe illusion in an especially elegant way (<- /s ).
It’s not work if it’s play.
At this point of twisting themselves into pretzels they might as well, in true DM fashion, just throw their hands up and shout “SHUT UP IT’S MAGICAL, OK ?! Now roll your fucking Will save.”
Yes, but is it a time cube?
I didn’t realize that Time Cube guy was dead and that the website was now defunct.
That makes me feel old, for some reason.