EdipisReks
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Using that logic one could argue that since sharpening removes metal, that sharpening is damaging the knife.
one can't arrive there using the same logic, but sharpening is absolutely damage, if one is looking at it from the standpoint of collector value. there is a reason depreciation exists. i don't buy knives for collector value, however, so i don't see sharpening a knife as being the same as grinding one edge first on a glass bottle.