Sharpness of a survival knife

My knives are sharp but i don't worry if they'll shave or not.i have a beater bowie that I sharpen with a file and occasionaly touch it up on concrete that cuts and chops very well.I also have a few Busse's with a mirror polished edge.Edge geometry is key.Also a slightly coarser edge seems to cut meat and vegetation (cordage to tomatoes) better while a polished edge seems better in chopping wood and similar harder matter.I had to cut a tire off a rim once and the razor sharp knife my buddy had wasn't doing it but with the more "toothy" filed edge of my knife i was able to cut it .
 
I like sharp. I've recently gotten a little bit OCD about it, in fact. My wife said, "that knife already cuts better than a light saber...stop sharpening it." then, later, "Any sharper and you'll be splitting atoms...stop sharpening it."
 
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