@KingOfWhiteAmerica @Starprophet1 @Jonny @matty @catmanmancat @suquili people don't get that questioning our perception of reality has nothing to do with the physical shape of an object. I think he didn't get the philosophical part in your questioning whether we are on a planet.
To me the question always is, is my perception real and can i trust it. Des Cartes said "I think therefore i am" which says you can't be sure about the existance of anything but your thoughts and therefore you conclude proof of your existance. But it also means everything else but your thoughts could be unreal. if you don't believe me ask a schizophrenic...