I had a bit of fun writing all that out, 10-18 , and in the end I do not know how to say this number, but if ever I brought this down to a ratio in terms of millimetres or kilometres, I would take the distance between the earth and the moon, and finally every millimetre, to the closest ppm, would be analysed. Is that right?
On October 24th, 2006. See this statement in context.