I can prove it to you that the earth is not flat given you are ready to accept facts, unlike other ignorant flat-earthers, ready to use logic and not be biased.
When you say facts I'm assuming you mean 3rd party information that can't be independently verified padded with appeals to authority and thinly veiled ad hominem attacks.
In any case let's see what you've got!
I won't attack you XD
Since you most probably won't even consider anything that I say which has the things which have already been proven to be true by scientists all over the globe over a lot of years I will try to not use these "3rd party information"
Lets start simple, go to an open area like a really big ground and look around you should be able to see the Mount Everest since it is amazing tall and on a flat earth everything will be in line of sight, even if you don't live in the usa on the 4th of July your sky should have been lit assuming the earth is flat, this is clearly not possible on a earth that is not flat.
I will wait for your response either accepting that you can't prove this is wrong or proving it wrong.
Perspective and the atmosphere limit the distance that objects are visible.