Gilgamesh writes:
Point 2.
Human hairs vary dramatically in width. I don't know whether Willowtree used this statement: "If you split a human hair in half - that is the difference between the British inch and the Sacred inch" as an attempt at a legitimate method of measure, or whether it was merely just a colorful way of saying that there is no difference between the two (I really can't tell with Willowtree: the stuff he posts in so left field).
If it was a method of measurement, then I claim it as utter utter tripe, based on me as an example. On the sides of my noggin' I have normal, healthy strong hair fibres of reasonable width. On the top, thanks to brilliant genetics pre-disposing me to male pattern baldness, I have feeble, thin and frail hair that is visible finer than the stuff on the sides.
Using human hair as a method of measurement is utter utter tripe.
You see, you read way too much into his words...
The English/Brittish inch IS The Sacred inch. It's one and the same! At some point in history, England decided that since they were such a swell nation, they should call their inch the Sacred inch to differentiate it from the load of other (widely varying) inches in the world.
The definition of the English/Sacred inch is indeed 1/500'000'000 of the polar diameter.
What he ment with the hair splitting thing is that there is no difference! Thus, trying to find a difference between them is like splitting hairs (ie, pointless and of little importance).