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There is a person called Eric Dubay who claims to offer "200 proofs" that the earth is flat. He is wrong in every way. He doesn’t offer 200 proofs, because he repeats himself again and again. They aren’t ‘proofs’  because they are consistently wrong, illogical, based on false statements or on misunderstandings. And the earth really isn’t flat!

I don't expect you to take my word for that. It's the last thing I'd want. Please read these refutations, follow up the evidence links, try the experiments I suggest so that you can see for yourself. 

I’ve tried to make these replies understandable to everybody, with no more technical stuff than is absolutely necessary to make  the point. I’ve also suggested ways that you can test the important questions for yourself.

Before we start, here are a few interesting  issues.

Am I just prejudiced against Flat earth beliefs?


Sources and resources

I’ve written many of these replies myself, but sometimes I’ve drawn on other people's work online. If you want to explore further, try these sources to get you started:

https://www.metabunk.org/debunked-the-flat-earth-theory-14-ways-the-flat-earth-theory-is-false.t7148/

14 ways the flat earth theory is false: an excellent set of key points. A few address different versions of flat earthism; Dubay  claims that the moon is a disk, for instance, and is irrationally rude about other flat earthers who disagree.Still, all the points are relevant.

There is a whole section of Metabunk on Flat Earth theories and why they can be shown to be wrong. If you disagree, you will be welcome to discuss your evidence there: Just make sure you do haveevidence, not empty claims though, and be prepared to discuss rationally and politely (read the politeness policy first). And please do start by checking out the existing discussions before you start a new one.

http://200proofsearthisnotflat.blogspot.co.uk/2016/02/debunking-dubay-1-7200.html

200 Proofs that the Earth is not flat.

A mix of the basic evidence in science and mathematics, with lots of fact-checking:

http://200proofsearthisnotflat.blogspot.co.uk/2016/02/debunking-dubay-1-7200.html)

200 Reasons why flat-earthers are simply wrong

A blog by a physicist and bit more technical than mine. Good if you want the arguments in more detail and gives some different source links:

http://blog.daimonie.com/2015_11_01_archive.html

 Looks harder at some of Dubay’s earlier claims:

Rebuttals and Refutations 200 Proofs: Examined 

http://the-uncredibles.tumblr.com/post/126969310214/200-proofs-examined

Finally, this isn’t a reply to Dubay in particular, but to all Flat Earthism:

Top 10 Ways to know the Earth is not flat

http://www.smarterthanthat.com/astronomy/top-10-ways-to-know-the-earth-is-not-flat/

Some interesting resources and discussion her:

http://www.flatearthdebunked.com/


This is a really excellent collection of reasons to dismiss flat earth claims:

https://www.metabunk.org/debunked-the-flat-earth-theory-14-ways-the-flat-earth-theory-is-false.t7148/