That depends. If I sharpened one of my larger fixed blades down to a very acute edge (like a straight razor) it would do fine with shaving, slicing paper, ect. However, the first time I use it to chop/baton or do any other hard use, the edge would become useless. Probably broken, bent, or heavily chipped. How sharp a tool needs to be depends on the application and what the design/materials can take.