God uses the laws of Science to Create the Universe. The Universe is very fine tuned. Even my machinist friends work in a tolerance of millionth. We do not always understand. For example Newton and Einstein have very different laws of gravity. No one seems to deny that gravity exists though. We believe that the laws are consistent anywhere you go in the universe. My son is working on a minor degree in applied mathematics. So we know how accurate and precise things are. He is real good at coming up with a formula that makes the math a lot easier and faster to do.Then he did not to be bound by science.
A finger print is 50 millionths thick, enough to cause problems when fitting spindle bearings.
A Sunnen Hone is guaranteed to hold 50 millionths.
A Romicron boring head will hold 80 millionths
A Crystal Lake Grinder can be special ordered with 5 millionths run out on its work head.
A Monarch 10EE was factory tested to hold 30 millionths on a 2" length.
Gage Blocks can be calibrated to about 2 millionths.
The crystal lake grinder is nothing short of amazing, 5 millionths, WOW! How did they do that?