9 Most Popular Flat Earth Arguments, Debunked

3. Argument: The Horizon Is Flat

So if the Earth is so "round" why is the horizon flat as a pancake? Even if you go up into space, the horizon looks flat and even appears to rise with you.

Here an argument is made:

On a clear day from the highland near Douglas Harbor on the Isle of Man, the whole length of the coast of North Wales is often plainly visible to the naked eye. From the Point of Ayr at the mouth of the River Dee to Holyhead comprises a 50 mile stretch which has also been repeatedly found to be perfectly horizontal. If the Earth actually had curvature of 8 inches per mile squared, as NASA and modern astronomy claim, the 50 mile length of Welsh coast seen along the horizon in Liverpool Bay would have to decline from the center-point an easily detectable 416 feet on each side!

Hell, even if you go up to ridiculously high altitudes, you can see that the horizon is similarly flat at all levels...