>According to the person I was responding to we can't even know if the statement the earth is flat is truthful. Yes, that is 100% correct. We cannot know for 1

>According to the person I was responding to we can't even know if the statement the earth is flat is truthful. Yes, that is 100% correct. We cannot know for 100% sure. However, we can assign degrees of certainty, which is the main thing that you are leaving out. We can be 99.9999999999999999999999999999% certain that the world is flat. And we can know that there is a .0000000000000000000000000000000000001% chance that the moon is made of green cheese (of course the top layer is rocky because of all the meteor strikes over the eons of time). At some point, one can make a judgement call and say that 100% for sure that the earth is round and not flat, but that is only a figure of speech, strictly speaking, when looking at the world from a scientific viewpoint. Only religion says that stuff is 100% true for all time. Definitively. Only religion.