Repeatable experiments, and direct observation.
Very basic.. just look at the place (repeatable and direct)
Now you're gonna say.. but it looks flat
and yes, it does.. from upclose. And RE supporters will agree to that..
BUT THINK OF THIS: RE supporters are the only ones who have looked further (gone up into space etc.)Now,
-if you don't believe that.. that is your problem.
-if none of your FE supporters have bothered to look further.. that is your problem
Point still remains that RE supporters have gathered more information on their surroundings (not just their near surroundings) than FE supporters
Imagine two groups of 5 people getting dropped in the wilderness.
group A lets one guy make a camp and sends out 4 guys to check the surroundings and make an accurate map
group B lets one guy make a camp and have the rest all sit around the campfire contemplating on what their position is, based on what they can see from the camp
Which group has a higher possibility of having more useful information?