 It doesn't say how far they were outside of the Garden of Eden. In fact, I don't know how far outside they were. And I would suggest you don't know how far outside they were either. Because 1,500 years after the Garden of Eden was established, there was a worldwide flood, and the topography of the earth was totally changed. The Tigris and Euphrates could have been very close. They weren't in the Garden of Eden, but they could have been close. I don't know. You don't know. Nobody knows. We don't know what it was like.