Like I said, you can't even tell the difference between no and I don't know. I had an epiphany about this in a thread last week, and I realised why so many discussions with atheists are so puzzling.
Because you're completely stunned?
Sam, the flat world is not a reasonable argument. You're arguing some kind of bizarre complete reductionist thinking whereby we can't know anything since we don't really know anything. This is absurd. We know the earth is round, and we know that it turns in the heavens. These are not things we have much real question about. If you want to say we know them to a certain probability approaching 1, fine. But you can't say with any reasonability that we don't know if the earth is round. You're using "I don't know" as an excuse for something or other, but excusing silliness on the premise of non-existent ignorance is ridiculous.