It's not my fault if you can't even use logic to think that it's impossible to tell the shape of the Earth in our local frame of reference. At least Kira gets it; you're just... nevermind.
I must correct myself, I agree with this statement: We cannot appreciate shape of Earth in full in our local frame of reference, using our senses.
The difference is in RET we can use different methods that our senses for get over our FoR and know the earth's shape. FET can't, it can't even draw a map. That's why although it's using valid premises, the result is a fail.