Chef Gordon Ramsay teaches a customer how to sharpen a kitchen knife. The lesson he gives here is little more than giving the knife an edge with a filing tool which is a short metallic rod the size of a knife. We frequently see chefs using sharpening knives this way although the motions are so fast that we don't know what they are actually doing. Ramsey, through teaching the customer slows the process down so that we can see what is going on and hence, how to do it.
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