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Lobby Dosser

wrote:

can you imagine if the conventional wisdom for judging size-tolerance
of fabricated-materials was along the lines of, "how does it feel when
i shave hairs on my arm?"

I want to _measure_ knife sharpness. In a repeatible, scientific
way. And preferably, non-destructive to the sharpened edge!

the floor is open for discussion.

You could measure the thickness of the cutting edge. Just about the
sharpest edge known is that of an obsidian tool. The edge is measured in
microns.

If you cut Anything, you have 'damaged' the edge.