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Sevenhundred Elves

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 perhaps measure the force it takes to cut a block of some soft
material, or the power it takes to do so in a given time interval.

S.